Semester 1 Final Term Exam

Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 12 1. One-to-One relationships are transformed into Check Constraints in the tables created at either end of that relationship. True or False? Mark for Review (1) Points True False (*) Correct 2. The Oracle Database can implement a many to many relationship. You simply create two foreign keys between the two tables. True or False? Mark for Review (1) Points True False (*) Incorrect. Refer to Section 12 3. Why would this table name NOT work in an Oracle database? this_year_end+next_year Mark for Review (1) Points Table names must begin with an alphabetic character Too long The Plus sign + is not allowed in object names (*) None of the above Incorrect. Refer to Section 12 4. In a physical data model, an attribute becomes a _____________. Mark for Review (1) Points Table Foreign Key Constraint

Column (*) Correct 5. In a physical data model, a relationship is represented as a combination of: (Choose Two) Mark for Review (1) Points (Choose all correct answers) Column Primary Key or Unique Key (*) Check Constraint or Unique Key Foreign Key (*) Incorrect. Refer to Section 12 6. Identify all of the incorrect statements that complete this sentence: A primary key is: (Choose three) Mark for Review (1) Points (Choose all correct answers) A single column that uniquely identifies each column in a table (*) One or more columns in a table that uniquely identifies each row in that table A set of columns in one table that uniquely identifies each row in another table (*) Only one column that must be null (*) Incorrect. Refer to Section 12 7. The explanation below is a column integrity constraint: A column must contain only values consistent with the defined data format of the column. True or False? Mark for Review (1) Points True (*) False

Correct 8. Foreign keys must be null. True or False? Mark for Review (1) Points True False (*) Correct 9. The explanation below is a User Defined integrity rule and must therefore be manually coded, the Database cannot enforce this rule automatically: A primary key must be unique, and no part of the primary key can be null. True or False? Mark for Review (1) Points True False (*) Incorrect. Refer to Section 12 10. When translating an arc relationship to a physical design, you must turn the arc relationships into foreign keys. Assuming you are implementing an Exclusive Design, you must also create two Unique Key Constraints to ensure the Arc is implemented correctly. True or False? Mark for Review (1) Points True False (*) Incorrect. Refer to Section 12 Page 1 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 12

11. Which of the following are reasons why you should consider using a Subtype Implementation? Mark for Review (1) Points The resulting table will reside in a single database and be used by just ONE user. When the common access paths for the supertypes are different. Business functionality and business rules, access paths and frequency of access are all very different between subtypes. (*) Most of the relationships are at the supertype level Incorrect. Refer to Section 12 Section 13 12. The _______ clause can be added to a SELECT statement to return a subset of the data. Mark for Review (1) Points ANYWHERE WHICH WHERE (*) EVERY Correct. 13. What command can be used to create a new row in a table in the database? Mark for Review (1) Points CREATE NEW ADD INSERT (*) Correct. Section 16

14. You want to create a list of all albums that have been produced by the company. The list should include the title of the album, the artist’s name, and the date the album was released. The ALBUMS table includes the following columns: ALB_TITLE VARCHAR2(150) NOT NULL ALB_ARTIST VARCHAR2(150) NOT NULL ALB_DATE DATE NOT NULL Which statement can you use to retrieve the necessary information? Mark for Review (1) Points SELECT * FROM albums; (*) SELECT alb_title, alb_artist, alb_dates FROM album; SELECT alb_title, alb_artist, alb_dates FROM albums; SELECT alb_title; alb_artist; alb_date FROM albums; Incorrect. See Section 16 15. In a SELECT clause, what is the result of 2 + 3 * 2? Mark for Review (1) Points 6 8 (*) 10 13 Correct. 16. Which SQL keyword specifies that an alias will be substituted for a column name in the output of a SQL query? Mark for Review (1) Points AS (*)

OR AND SUBSTITUTE Correct. 17. When you use the SELECT clause to list one or two columns only from a table and no WHERE clause, which SQL capability is used? Mark for Review (1) Points Joining only Selection only Projection only (*) Projection and Selection Incorrect. See Section 16 18. When listing columns in the SELECT list, what should you use to separate the columns? Mark for Review (1) Points Commas (*) Semicolons Dashes Underscores Correct. 19. In which clause of a SELECT statement would you specify the name of the table or tables being queried? Mark for Review (1) Points The FROM clause (*) The SELECT clause The WHERE clause

Any of the above options, you can list tables wherever you want to in a SELECT statement. Correct. 20. The SELECT statement retrieves information from the database. In a SELECT statement, you can do all of the following EXCEPT: Mark for Review (1) Points Projection Manipulation (*) Joining Selection Incorrect. See Section 16 Page 2 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 16 21. In a SELECT statement Additions are evaluated before Multiplications. True or False? Mark for Review (1) Points True False (*) Correct. 22. You cannot use computers unless you completely understand exactly how they work. True or False? Mark for Review (1) Points True False (*)

Incorrect. See Section 16 Section 17 23. The STUDENT table contains these columns: STUDENT_ID NUMBER(10) Primary Key LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) MAIN_SUBJECT_ID NUMBER(3) ADVISOR_ID NUMBER(5) Evaluate this statement: SELECT DISTINCT advisor_id, main_subject_id FROM student; Which statement is true? Mark for Review (1) Points Each ADVISOR_ID can be displayed only once. Each MAIN_SUBJECT_ID can be displayed more than once per ADVISOR_ID. (*) Each combination of ADVISOR_ID and MAIN_SUBJECT_ID can be displayed more than once. Each MAIN_SUBJECT_ID can be displayed only once per query. Incorrect. See Section 17 24. You want to create a report that displays all employees who were hired before January 1, 2000 and whose annual salaries are greater than 50000. The EMPLOYEES table contains these columns: EMPLOYEE_ID VARCHAR2(5) PRIMARY KEY LAST_NAME VARCHAR2(35) HIREDATE DATE DEPARTMENT_ID NUMBER(4) The SALARY table contains these columns: SALARYID VARCHAR2(5) PRIMARY KEY SALARY NUMBER(5, 2) EMPLOYEE_ID VARCHAR2(5) FOREIGN KEY

Which query should you issue? Mark for Review (1) Points SELECT last_name, hiredate, salary FROM employees NATURAL JOIN salary USING employee_id WHERE hiredate < 01-jan-00 AND salary > 50000; SELECT last_name, hiredate, salary FROM employees JOIN salary ON employee_id = employee_id WHERE hiredate < ’01-jan-00′ AND salary > 50000; SELECT last_name, hiredate, salary FROM employees NATURAL JOIN salary WHERE hiredate < ’01-jan-00′ AND salary > 50000; (*) SELECT last_name, hiredate, salary FROM employees (+) salary WHERE hiredate < ’01-jan-00′ AND salary > 50000; Incorrect 25. The EMPLOYEES table includes these columns: EMPLOYEE_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(15) NOT NULL FIRST_NAME VARCHAR2(10) NOT NULL HIRE_DATE DATE NOT NULL You want to produce a report that provides the first names, last names and hire dates of those employees who were hired between March 1, 2000, and August 30, 2000. Which statements can you issue to accomplish this task? Mark for Review (1) Points SELECT last_name, first_name, hire_date FROM employees WHERE hire_date BETWEEN ’01-MAR-00′ AND ’30-AUG-00′; (*) SELECT last_name, first_name, hire_date FROM employees WHERE hire_date BETWEEN ’30-AUG-00′ AND ’01-MAR-00′;

SELECT last_name, first_name, hire_date FROM employees GROUP BY hire_date >= ’01-MAR-00′ and hire_date = ’01-MAR-00′ and hire_date 20000; Which values would cause the logical condition to return TRUE? Mark for Review (1) Points DEPARTMENT_ID = 10 and SALARY = 20000 DEPARTMENT_ID = 20 and SALARY = 20000 DEPARTMENT_ID = null and SALARY = 20001 DEPARTMENT_ID = 10 and SALARY = 20001 (*) Correct. See Section 17

28. If the EMPLOYEES table has the following columns, and you want to write a SELECT statement to return the employee last name and department number for employee number 176, which of the following SQL statements should you use? Name Type Length EMPLOYEE_ID NUMBER 22 FIRST_NAME VARCHAR2 20 LAST_NAME VARCHAR2 25 EMAIL VARCHAR2 25 PHONE_NUMBER VARCHAR2 20 SALARY NUMBER 22 COMMISSION_PCT NUMBER 22 MANAGER_ID NUMBER 22 DEPARTMENT_ID NUMBER 22 Mark for Review (1) Points SELECT last_name, department_id FROM employees WHERE employee_id = 176; (*) SELECT last_name, department_id FROM employees WHERE employee_id equals 176; SELECT first_name, employee_id FROM employees WHERE employee_id = 176; SELECT last_name, employee_id FROM employees WHERE employee_id equals 176; Correct. 29. Evaluate this SELECT statement: SELECT last_name, first_name, salary FROM employees; How will the heading for the SALARY column appear in the display by default in Oracle Application Express? Mark for Review (1) Points The heading will display with the first character capitalized and centered.

The heading will display with the first character capitalized and left justified. The heading will display as uppercase and centered. (*) The heading will display as uppercase and left justified. Correct. 30. You need write a SELECT statement that should only return rows that contain 34, 46, or 48 for the DEPARTMENT_ID column. Which operator should you use in the WHERE clause to compare the DEPARTMENT_ID column to this specific list of values? Mark for Review (1) Points = != IN (*) BETWEEN..AND.. Correct. Page 3 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 17 31. Which comparison operator searches for a specified character pattern? Mark for Review (1) Points IN LIKE (*) BETWEEN…AND… IS NULL Incorrect. See Section 17.

32. What does the DISTINCT keyword do when it is used in a SELECT clause? Mark for Review (1) Points Hides NULL values Eliminates all unique values and compares values Eliminates duplicate rows in the result (*) Eliminates only unique rows in the result Incorrect. See Section 17 33. Which symbol represents the not equal to condition? Mark for Review (1) Points # ‘+’ != (*) ~ Correct. 34. Which of the following elements cannot be included in a WHERE clause? Mark for Review (1) Points A column alias (*) A column name A comparison condition A constant Correct. 35. Where in a SQL statement can you not use arithmetic operators? Mark for Review (1) Points SELECT FROM (*)

WHERE NONE Incorrect. See Section 17. 36. Which clause would you include in a SELECT statement to restrict the data returned to only the employees in department 10? Mark for Review (1) Points WHERE (*) FROM SELECT IS Correct. Section 18 37. Which of the following best describes the meaning of the LIKE operator? Mark for Review (1) Points Display rows based on a range of values. To test for values in a list. Match a character pattern. (*) To find Null values. Incorrect. See Section 18 38. The ORDER BY clause always comes last. True or False? Mark for Review (1) Points True (*) False Correct. 39. Which of the following is TRUE regarding the logical AND operator? Mark for Review (1) Points

TRUE AND TRUE return FALSE TRUE AND FALSE return TRUE FALSE AND TRUE return NULL TRUE AND FALSE return FALSE (*) Incorrect. See Section 18 40. Which clause would you include in a SELECT statement to sort the rows returned by the LAST_NAME column? Mark for Review (1) Points ORDER BY (*) WHERE FROM HAVING Incorrect. See Section 18 Page 4 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 18 41. Which comparison condition means “Less Than or Equal To?” Mark for Review (1) Points “=)” “+=” “ 25000 OR salary < 100000) AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id, salary; SELECT last_name, first_name, team_id, salary FROM players WHERE salary BETWEEN 25000 AND 100000 AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id, salary DESC; (*) SELECT last_name, first_name, team_id, salary FROM players WHERE salary > 24999.99 AND salary < 100000 AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id ASC, salary DESC; SELECT last_name, first_name, team_id, salary FROM players WHERE salary BETWEEN 24999.99 AND 100000.01 AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id DESC, salary DESC;

Correct. 50. Evaluate this SQL statement: SELECT e.employee_id, e.last_name, e.first_name, m.manager_id FROM employees e, employees m ORDER BY e.last_name, e.first_name WHERE e.employee_id = m.manager_id; This statement fails when executed. Which change will correct the problem? Mark for Review (1) Points Reorder the clauses in the query. (*) Remove the table aliases in the WHERE clause. Remove the table aliases in the ORDER BY clause. Include a HAVING clause. Incorrect! See Section 18. Page 5 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 12 1. In a physical data model, a relationship is represented as a combination of: (Choose Two) Mark for Review (1) Points (Choose all correct answers) Column Primary Key or Unique Key (*) Check Constraint or Unique Key Foreign Key (*)

Correct 2. In a physical data model, an attribute becomes a _____________. Mark for Review (1) Points Table Foreign Key Constraint Column (*) Correct 3. Why would this table name NOT work in an Oracle database? this_year_end+next_year Mark for Review (1) Points Table names must begin with an alphabetic character Too long The Plus sign + is not allowed in object names (*) None of the above Correct 4. When mapping supertypes, relationships at the supertype level transform as usual. Relationships at subtype level are implemented as foreign keys, but the foreign key columns all become mandatory. True or False? Mark for Review (1) Points True False (*) Correct 5. Which of the following are reasons why you should consider using a Subtype Implementation? Mark for Review (1) Points The resulting table will reside in a single database and be used by just ONE user.

When the common access paths for the supertypes are different. Business functionality and business rules, access paths and frequency of access are all very different between subtypes. (*) Most of the relationships are at the supertype level Correct 6. The Oracle Database can implement a many to many relationship. You simply create two foreign keys between the two tables. True or False? Mark for Review (1) Points True False (*) Correct 7. It is possible to implement non-transferability via a simple Foreign Key Relationship. True or False? Mark for Review (1) Points True False (*) Incorrect. Refer to Section 12 8. The text below is an example of what constraint type: The value in the manager_id column of the EMPLOYEES table must match a value in the employee_id column in the EMPLOYEES table. Mark for Review (1) Points Entity integrity User-defined integrity Column integrity Referential integrity (*) Correct

9. Entity integrity refers to Mark for Review (1) Points Tables always containing text data Tables always containing numeric data Columns having Primary Keys, Foreign Keys, Unique Keys and Check constraints defined in the database. Tables having Primary Keys, Foreign Keys, Unique Keys and Check constraints defined in the database. (*) Incorrect. Refer to Section 12 10. Identify all of the incorrect statements that complete this sentence: A primary key is: (Choose three) Mark for Review (1) Points (Choose all correct answers) A single column that uniquely identifies each column in a table (*) One or more columns in a table that uniquely identifies each row in that table A set of columns in one table that uniquely identifies each row in another table (*) Only one column that must be null (*) Incorrect. Refer to Section 12 Page 1 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 12 11. The explanation below is a column integrity constraint: A column must contain only values consistent with the defined data format of the column. True or False?

Mark for Review (1) Points True (*) False Correct Section 13 12. The DESCRIBE command returns all rows from a table. True or False? Mark for Review (1) Points True False (*) Correct. 13. What command can be used to create a new row in a table in the database? Mark for Review (1) Points CREATE NEW ADD INSERT (*) Correct. Section 16 14. In a SQL statement, which clause specifies one or more columns to be returned by the query? Mark for Review (1) Points SELECT (*) FROM WHERE

Any of the above options, you can list columns wherever you want to in a SELECT statement. Incorrect. See Section 16 15. Which SQL keyword specifies that an alias will be substituted for a column name in the output of a SQL query? Mark for Review (1) Points AS (*) OR AND SUBSTITUTE Correct. 16. The SELECT statement retrieves information from the database. In a SELECT statement, you can do all of the following EXCEPT: Mark for Review (1) Points Projection Manipulation (*) Joining Selection Correct. 17. When listing columns in the SELECT list, what should you use to separate the columns? Mark for Review (1) Points Commas (*) Semicolons Dashes Underscores Correct.

18. In the default order of precedence, which operator would be evaluated first? Mark for Review (1) Points Subtractions Multiplications (*) Additions Divisions Correct. 19. When you use the SELECT clause to list one or two columns only from a table and no WHERE clause, which SQL capability is used? Mark for Review (1) Points Joining only Selection only Projection only (*) Projection and Selection Incorrect. See Section 16 20. In which clause of a SELECT statement would you specify the name of the table or tables being queried? Mark for Review (1) Points The FROM clause (*) The SELECT clause The WHERE clause Any of the above options, you can list tables wherever you want to in a SELECT statement. Incorrect. See Section 16 Page 2 of 5 Test: Final Exam Semester 1

Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 16 21. There is only one kind of software used by all computers. True or False? Mark for Review (1) Points True False (*) Correct. 22. In a SELECT statement Additions are evaluated before Multiplications. True or False? Mark for Review (1) Points True False (*) Correct. Section 17 23. If the EMPLOYEES table has the following columns, and you want to write a SELECT statement to return the employee last name and department number for employee number 176, which of the following SQL statements should you use? Name Type Length EMPLOYEE_ID NUMBER 22 FIRST_NAME VARCHAR2 20 LAST_NAME VARCHAR2 25 EMAIL VARCHAR2 25 PHONE_NUMBER VARCHAR2 20 SALARY NUMBER 22 COMMISSION_PCT NUMBER 22 MANAGER_ID NUMBER 22 DEPARTMENT_ID NUMBER 22 Mark for Review (1) Points

SELECT last_name, department_id FROM employees WHERE employee_id = 176; (*) SELECT last_name, department_id FROM employees WHERE employee_id equals 176; SELECT first_name, employee_id FROM employees WHERE employee_id = 176; SELECT last_name, employee_id FROM employees WHERE employee_id equals 176; Correct. 24. You want to retrieve a list of customers whose last names begin with the letters Fr . Which symbol should you include in the WHERE clause of your SELECT statement to achieve the desired result? Mark for Review (1) Points % (*) ~ # * Correct. See Section 17 25. Evaluate this SELECT statement: SELECT last_name, first_name, salary FROM employees; How will the heading for the SALARY column appear in the display by default in Oracle Application Express? Mark for Review (1) Points The heading will display with the first character capitalized and centered. The heading will display with the first character capitalized and left justified.

The heading will display as uppercase and centered. (*) The heading will display as uppercase and left justified. Correct. 26. Which SELECT statement will display both unique and non-unique combinations of the MANAGER_ID and DEPARTMENT_ID values from the EMPLOYEES table? Mark for Review (1) Points SELECT manager_id, department_id DISTINCT FROM employees; SELECT manager_id, department_id FROM employees; (*) SELECT DISTINCT manager_id, department_id FROM employees; SELECT manager_id, DISTINCT department_id FROM employees; Incorrect. See Section 17. 27. You need to display all the employees whose last name starts with the letters Sm . Which WHERE clause should you use? Mark for Review (1) Points WHERE last_name LIKE ‘Sm%’ (*) WHERE last_name LIKE ‘%Sm’ WHERE last_name LIKE ‘_Sm’ WHERE last_name LIKE ‘Sm_’ Correct. See Section 17 28. The STUDENT table contains these columns: STUDENT_ID NUMBER(10) Primary Key LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) MAIN_SUBJECT_ID NUMBER(3) ADVISOR_ID NUMBER(5) Evaluate this statement: SELECT DISTINCT advisor_id, main_subject_id FROM student;

Which statement is true? Mark for Review (1) Points Each ADVISOR_ID can be displayed only once. Each MAIN_SUBJECT_ID can be displayed more than once per ADVISOR_ID. (*) Each combination of ADVISOR_ID and MAIN_SUBJECT_ID can be displayed more than once. Each MAIN_SUBJECT_ID can be displayed only once per query. Correct. See Section 17 29. The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER(9) PrimaryKey LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) DEPARTMENT_ID NUMBER(5) NOT NULL MANAGER_ID NUMBER(9) NOT NULL Evaluate these two SELECT statements: 1. SELECT DISTINCT employee_id, department_id, manager_id FROM employees; 2. SELECT employee_id, department_id, manager_id FROM employees; Which of the following statements is true? Mark for Review (1) Points The two statements will display the same data. (*) The first statement will display a particular DEPARTMENT_ID only once. The first statement will NOT display values from all of the rows in the EMPLOYEES table The second statement could display a unique combination of the EMPLOYEE_ID, MANAGER_ID, and DEPARTMENT_ID values more than once. Correct. See Section 17 30. If you write queries using the BETWEEN operator it does not matter in what order you enter the values, i.e. BETWEEN low value AND high value will give the same result as BETWEEN high value and low value. True or False? Mark for Review (1) Points

True False (*) Correct. Page 3 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 17 31. Which comparison condition would you use to select rows that match a character pattern? Mark for Review (1) Points IN LIKE (*) ALMOST SIMILAR Incorrect. See Section 17. 32. You need to display employees whose salary is in the range of 30000 and 50000. Which comparison operator should you use? Mark for Review (1) Points IN LIKE BETWEEN…AND… (*) IS NULL Correct.

33. What does the DISTINCT keyword do when it is used in a SELECT clause? Mark for Review (1) Points Hides NULL values Eliminates all unique values and compares values Eliminates duplicate rows in the result (*) Eliminates only unique rows in the result Correct. See Section 17 34. Which comparison operator searches for a specified character pattern? Mark for Review (1) Points IN LIKE (*) BETWEEN…AND… IS NULL Incorrect. See Section 17. 35. Where in a SQL statement can you not use arithmetic operators? Mark for Review (1) Points SELECT FROM (*) WHERE NONE Correct. 36. Which symbol represents the not equal to condition? Mark for Review (1) Points # ‘+’

!= (*) ~ Correct. Section 18 37. Evaluate this SQL statement: SELECT e.employee_id, e.last_name, e.first_name, m.manager_id FROM employees e, employees m ORDER BY e.last_name, e.first_name WHERE e.employee_id = m.manager_id; This statement fails when executed. Which change will correct the problem? Mark for Review (1) Points Reorder the clauses in the query. (*) Remove the table aliases in the WHERE clause. Remove the table aliases in the ORDER BY clause. Include a HAVING clause. Correct. 38. The PLAYERS table contains these columns: PLAYERS TABLE: LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) SALARY NUMBER(8,2) TEAM_ID NUMBER(4) MANAGER_ID NUMBER(9) POSITION_ID NUMBER(4) You must display the player name, team id, and salary for players whose salary is in the range from 25000 through 100000 and whose team id is in the range of 1200 through 1500. The results must be sorted by team id from lowest to highest and then further sorted by salary from highest to lowest. Which statement should you use to display the desired result? Mark for Review (1) Points SELECT last_name, first_name, team_id, salary FROM players WHERE (salary > 25000 OR salary < 100000)

AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id, salary; SELECT last_name, first_name, team_id, salary FROM players WHERE salary BETWEEN 25000 AND 100000 AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id, salary DESC; (*) SELECT last_name, first_name, team_id, salary FROM players WHERE salary > 24999.99 AND salary < 100000 AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id ASC, salary DESC; SELECT last_name, first_name, team_id, salary FROM players WHERE salary BETWEEN 24999.99 AND 100000.01 AND team_id BETWEEN 1200 AND 1500 ORDER BY team_id DESC, salary DESC; Correct. 39. Which statement about the default sort order is true? Mark for Review (1) Points The lowest numeric values are displayed last. The earliest date values are displayed first. (*) Null values are displayed first. Character values are displayed in reverse alphabetical order. Correct. 40. The ORDER BY clause always comes last. True or False? Mark for Review (1) Points True (*) False Correct.

Page 4 of 5 Test: Final Exam Semester 1 Review your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 18 41. Which logical operator returns TRUE if either condition is true? Mark for Review (1) Points OR (*) AND NOT BOTH Correct. 42. Which comparison condition means “Less Than or Equal To?” Mark for Review (1) Points “=)” “+=” “ 50); Which two values could the statement return? (Choose two.) Mark for Review (1) Points (Choose all correct answers) 1 50 25 (*) 10 250 (*) 100 Correct. 46. Evaluate this SQL statement: SELECT product_id, product_name, price

FROM products ORDER BY product_name, price; What occurs when the statement is executed? Mark for Review (1) Points The results are sorted numerically only. The results are sorted alphabetically only. The results are sorted numerically and then alphabetically. The results are sorted alphabetically and then numerically. (*) Correct. 47. Evaluate this SELECT statement: SELECT last_name, first_name, email FROM employees ORDER BY email; If the EMAIL column contains null values, which statement is true? Mark for Review (1) Points Null email values will be displayed first in the result. Null email values will be displayed last in the result. (*) Null email values will not be displayed in the result. The result will not be sorted. Correct. 48. What value will the following SQL statement return? SELECT employee_id FROM employees WHERE employee_id BETWEEN 100 AND 150 OR employee_id IN(119, 175, 205) AND (employee_id BETWEEN 150 AND 200); Mark for Review (1) Points

19 No rows will be returned 100, 101, 102, 103, 104, 107, 124, 141, 142, 143, 144, 149 (*) 200, 201, 202, 203, 204, 205, 206 Correct. 49. Which SELECT statement should you use to limit the display of product information to those products with a price of less than 50? Mark for Review (1) Points SELECT product_id, product_name FROM products WHERE price < 50; (*) SELECT product_id, product_name FROM products HAVING price < 50; SELECT product_id, product_name FROM products WHERE price = ’01-MAR-00′ and hire_date = ’01-MAR-00′ and hire_date 20000; Which values would cause the logical condition to return TRUE? Markeren voor nakijken (1) Punten DEPARTMENT_ID = 10 and SALARY = 20000 DEPARTMENT_ID = 20 and SALARY = 20000 DEPARTMENT_ID = null and SALARY = 20001 DEPARTMENT_ID = 10 and SALARY = 20001 (*) Correct. See Section 17 34. You need write a SELECT statement that should only return rows that contain 34, 46, or 48 for the DEPARTMENT_ID column. Which operator should you use in the WHERE clause to compare the DEPARTMENT_ID column to this specific list of values? Markeren voor nakijken (1) Punten = != IN (*) BETWEEN..AND.. Correct. 35. Evaluate this SELECT statement: SELECT last_name, first_name, salary FROM employees;

How will the heading for the SALARY column appear in the display by default in Oracle Application Express? Markeren voor nakijken (1) Punten The heading will display with the first character capitalized and centered. The heading will display with the first character capitalized and left justified. The heading will display as uppercase and centered. (*) The heading will display as uppercase and left justified. Incorrect. See Section 17. 36. You need to display all the values in the EMAIL column that contains the underscore (_) character as part of that email address. The WHERE clause in your SELECT statement contains the LIKE operator. What must you include in the LIKE operator? Markeren voor nakijken (1) Punten The ESCAPE option (\) and one or more percent signs (%) The (+) operator A percent sign (%) The ESCAPE option (\) (*) Incorrect. See Section 17 Section 18 37. The PLAYERS table contains these columns: PLAYERS TABLE: LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) SALARY NUMBER(8,2) TEAM_ID NUMBER(4) MANAGER_ID NUMBER(9) POSITION_ID NUMBER(4) You must display the player name, team id, and salary for players whose salary is in the range from 25000 through 100000 and whose team id is in the range of 1200 through 1500. The results must be sorted by team id from lowest to highest and then further sorted by salary from highest to lowest. Which statement should you use to display the desired result? Markeren voor nakijken (1) Punten

SELECT last_name, first_name, team_id, salary FROM players WHERE (salary > 25000 OR salary 24999.99 AND salary = 6900 ORDER BY last_name, first_name; (*) SELECT last_name, first_name FROM players WHERE position_id > 6900 ORDER BY last_name, first_name; SELECT last_name, first_name FROM players WHERE position_id = 6900 ORDER BY last_name DESC, first_name; Correct. 39. Which statement about the logical operators is true? Markeren voor nakijken (1) Punten The order of operator precedence is AND, OR, and NOT. The order of operator precedence is AND, NOT, and OR. The order of operator precedence is NOT, OR, and AND. The order of operator precedence is NOT, AND, and OR. (*) Incorrect. See Section 18 40. Which of the following is TRUE regarding the logical AND operator? Markeren voor nakijken (1) Punten TRUE AND TRUE return FALSE TRUE AND FALSE return TRUE FALSE AND TRUE return NULL TRUE AND FALSE return FALSE (*) Correct. Section 18

41. Which logical operator returns TRUE if either condition is true? Markeren voor nakijken (1) Punten OR (*) AND NOT BOTH Correct. 42. Which comparison condition means “Less Than or Equal To?” Markeren voor nakijken (1) Punten “=)” “+=” ” 50); Which two values could the statement return? (Choose two.) Markeren voor nakijken (1) Punten (Kies alle goede antwoorden.) 1 50 25 (*) 10 250 (*) 100 Incorrect! See Section 18. 48. Evaluate this SQL statement: SELECT product_id, product_name, price FROM products ORDER BY product_name, price; What occurs when the statement is executed? Markeren voor nakijken (1) Punten

The results are sorted numerically only. The results are sorted alphabetically only. The results are sorted numerically and then alphabetically. The results are sorted alphabetically and then numerically. (*) Correct. 49. What value will the following SQL statement return? SELECT employee_id FROM employees WHERE employee_id BETWEEN 100 AND 150 OR employee_id IN(119, 175, 205) AND (employee_id BETWEEN 150 AND 200); Markeren voor nakijken (1) Punten 19 No rows will be returned 100, 101, 102, 103, 104, 107, 124, 141, 142, 143, 144, 149 (*) 200, 201, 202, 203, 204, 205, 206 Incorrect! See Section 18. 50. Evaluate this SELECT statement: SELECT * FROM employees WHERE salary > 30000 AND department_id = 10 OR email IS NOT NULL; Which statement is true? Markeren voor nakijken (1) Punten The OR condition will be evaluated before the AND condition. The AND condition will be evaluated before the OR condition. (*) The OR and AND conditions have the same precedence and will be evaluated from left to right The OR and AND conditions have the same precedence and will be evaluated from right to left Correct.

Section 12 1. An “Arc Implementation” can be done just like any other Relationship – you simply add the required Foreign Keys. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*) Incorrect. Refer to Section 12 2. Which of the following are reasons why you should consider using a Subtype Implementation? Markeren voor nakijken (1) Punten The resulting table will reside in a single database and be used by just ONE user. When the common access paths for the supertypes are different. Business functionality and business rules, access paths and frequency of access are all very different between subtypes. (*) Most of the relationships are at the supertype level Incorrect. Refer to Section 12 3. It is possible to implement non-transferability via a simple Foreign Key Relationship. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*) Correct 4. The Oracle Database can implement a many to many relationship. You simply create two foreign keys between the two tables. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*) Correct

5. The explanation below is a column integrity constraint: A column must contain only values consistent with the defined data format of the column. True or False? Markeren voor nakijken (1) Punten Waar (*) Niet waar Correct 6. A foreign key cannot refer to a primary key in the same table. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*) Incorrect. Refer to Section 12 7. The text below is an example of what constraint type: If the number of BOOKS lent to a BORROWER in the LIBRARY exceeds 5, then we must send him/her a letter requesting the return of the BOOKS, which will require extra programming to enforce. Markeren voor nakijken (1) Punten Entity integrity User-defined integrity (*) Column integrity Referential integrity Correct 8. A table must have a primary key. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*) Incorrect. Refer to Section 12

9. Why would this table name NOT work in an Oracle database? this_year_end+next_year Markeren voor nakijken (1) Punten Table names must begin with an alphabetic character Too long The Plus sign + is not allowed in object names (*) None of the above Correct 10. In a physical data model, an attribute becomes a _____________. Markeren voor nakijken (1) Punten Table Foreign Key Constraint Column (*) Incorrect. Refer to Section 12 Section 12 11. In an Oracle database, why would 1_TABLE not work as a table name? Markeren voor nakijken (1) Punten The database does not understand all capital letters There is no problem here. You can create a table called 1_TABLE. Object names must not start with a number. They must begin with a letter (*) TABLE is a reserved word Incorrect. Refer to Section 12 Section 13

12. The _______ clause can be added to a SELECT statement to return a subset of the data. Markeren voor nakijken (1) Punten ANYWHERE WHICH WHERE (*) EVERY Correct. 13. What command will return data from the database to you? Markeren voor nakijken (1) Punten FETCH GET SELECT (*) RETURN Correct. Section 16 14. There is only one kind of software used by all computers. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*) Correct. 15. In a SELECT statement Additions are evaluated before Multiplications. True or False? Markeren voor nakijken (1) Punten Waar Niet waar (*)

Correct. 16. You query the database with this SQL statement: SELECT * FROM transaction WHERE product_id = 4569; Which SQL SELECT statement capabilities are achieved when this statement is executed? Markeren voor nakijken (1) Punten Selection only (*) Projection only Selection and projection only Projection, selection and joining Incorrect. See Section 16 17. You query the database with this SQL statement: SELECT * FROM students; Why would you use this statement? Markeren voor nakijken (1) Punten To insert data To view data (*) To display the table structure To delete data Correct. 18. In a SQL statement, which clause specifies one or more columns to be returned by the query? Markeren voor nakijken (1) Punten SELECT (*) FROM WHERE Any of the above options, you can list columns wherever you want to in a SELECT statement.

Incorrect. See Section 16 19. Which SQL statement will return an error? Markeren voor nakijken (1) Punten SEL * FR sky; (*) select star from sky; SELECT star FROM sky; SELECT * FROM sky; Incorrect. See Section 16 20. When you use the SELECT clause to list one or two columns only from a table and no WHERE clause, which SQL capability is used? Markeren voor nakijken (1) Punten Joining only Selection only Projection only (*) Projection and Selection Correct. Section 16 21. When listing columns in the SELECT list, what should you use to separate the columns? Markeren voor nakijken (1) Punten Commas (*) Semicolons Dashes Underscores Correct.

22. In the default order of precedence, which operator would be evaluated first? Markeren voor nakijken (1) Punten Subtractions Multiplications (*) Additions Divisions Correct. Section 17 23. You need to display all the rows in the EMPLOYEES table that contain a null value in the DEPARTMENT_ID column. Which comparison operator should you use? Markeren voor nakijken (1) Punten “= NULL” NULL! ISNULL IS NULL (*) Correct. 24. You need to display employees with salaries that are at least 30000 or higher. Which comparison operator should you use? Markeren voor nakijken (1) Punten > “=>” >= (*) != Correct.

25. Where in a SQL statement can you not use arithmetic operators? Markeren voor nakijken (1) Punten SELECT FROM (*) WHERE NONE Incorrect. See Section 17. 26. Which clause would you include in a SELECT statement to restrict the data returned to only the employees in department 10? Markeren voor nakijken (1) Punten WHERE (*) FROM SELECT IS Correct. 27. You need to display employees whose salary is in the range of 30000 and 50000. Which comparison operator should you use? Markeren voor nakijken (1) Punten IN LIKE BETWEEN…AND… (*) IS NULL Correct. 28. The Concatenation Operator does which of the following? Markeren voor nakijken (1) Punten Links rows of data together inside the database.

Links two or more columns or literals to form a single output column (*) Is represented by the asterisk (*) symbol Separates columns. Correct. See Section 17 29. The EMPLOYEES table includes these columns: EMPLOYEE_ID NUMBER(4) NOT NULL LAST_NAME VARCHAR2(15) NOT NULL FIRST_NAME VARCHAR2(10) NOT NULL HIRE_DATE DATE NOT NULL You want to produce a report that provides the first names, last names and hire dates of those employees who were hired between March 1, 2000, and August 30, 2000. Which statements can you issue to accomplish this task? Markeren voor nakijken (1) Punten SELECT last_name, first_name, hire_date FROM employees WHERE hire_date BETWEEN ’01-MAR-00′ AND ’30-AUG-00′; (*) SELECT last_name, first_name, hire_date FROM employees WHERE hire_date BETWEEN ’30-AUG-00′ AND ’01-MAR-00′; SELECT last_name, first_name, hire_date FROM employees GROUP BY hire_date >= ’01-MAR-00′ and hire_date = ’01-MAR-00′ and hire_date 50); Which two values could the statement return? (Choose two.) Markeren voor nakijken (1) Punten (Kies alle goede antwoorden.) 1 50 25 (*) 10 250 (*) 100

Correct. 45. Which SELECT statement should you use to limit the display of product information to those products with a price of less than 50? Markeren voor nakijken (1) Punten SELECT product_id, product_name FROM products WHERE price < 50; (*) SELECT product_id, product_name FROM products HAVING price < 50; SELECT product_id, product_name FROM products WHERE price 20000; Which values would cause the logical condition to return TRUE? Markeren voor nakijken (1) Punten DEPARTMENT_ID = 10 and SALARY = 20000 DEPARTMENT_ID = 20 and SALARY = 20000 DEPARTMENT_ID = null and SALARY = 20001 DEPARTMENT_ID = 10 and SALARY = 20001 (*) Incorrect. See Section 17 30. You want to retrieve a list of customers whose last names begin with the letters Fr . Which keyword should you include in the WHERE clause of your SELECT statement to achieve the desired result? Markeren voor nakijken (1) Punten AND IN BETWEEN LIKE (*)

Correct. See Section 17 Section 17 31. You need write a SELECT statement that should only return rows that contain 34, 46, or 48 for the DEPARTMENT_ID column. Which operator should you use in the WHERE clause to compare the DEPARTMENT_ID column to this specific list of values? Markeren voor nakijken (1) Punten = != IN (*) BETWEEN..AND.. Incorrect. See Section 17. 32. You want to retrieve a list of customers whose last names begin with the letters Fr . Which symbol should you include in the WHERE clause of your SELECT statement to achieve the desired result? Markeren voor nakijken (1) Punten % (*) ~ # * Correct. See Section 17 33. You want to determine the orders that have been placed by customers who reside in Chicago. You write this partial SELECT statement: SELECT orderid, orderdate, total FROM orders; What should you include in your SELECT statement to achieve the desired results? Markeren voor nakijken (1) Punten AND city = Chicago; AND city = ‘Chicago’;

WHERE city = ‘Chicago’; (*) WHERE city = Chicago; Correct. 34. The EMPLOYEES table contains these columns: LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) EMAIL VARCHAR2(50) You are writing a SELECT statement to retrieve the names of employees that have an email address. SELECT last_name||’, ‘||first_name “Employee Name” FROM employees; Which WHERE clause should you use to complete this statement? Markeren voor nakijken (1) Punten WHERE email = NULL; WHERE email != NULL; WHERE email IS NULL; WHERE email IS NOT NULL; (*) Incorrect. See Section 17. 35. You want to create a report that displays all employees who were hired before January 1, 2000 and whose annual salaries are greater than 50000. The EMPLOYEES table contains these columns: EMPLOYEE_ID VARCHAR2(5) PRIMARY KEY LAST_NAME VARCHAR2(35) HIREDATE DATE DEPARTMENT_ID NUMBER(4) The SALARY table contains these columns: SALARYID VARCHAR2(5) PRIMARY KEY SALARY NUMBER(5, 2) EMPLOYEE_ID VARCHAR2(5) FOREIGN KEY Which query should you issue? Markeren voor nakijken (1) Punten SELECT last_name, hiredate, salary FROM employees NATURAL JOIN salary USING employee_id WHERE hiredate 50000;

SELECT last_name, hiredate, salary FROM employees JOIN salary ON employee_id = employee_id WHERE hiredate 50000; SELECT last_name, hiredate, salary FROM employees NATURAL JOIN salary WHERE hiredate 50000; (*) SELECT last_name, hiredate, salary FROM employees (+) salary WHERE hiredate 50000; Incorrect 36. The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER(9) PrimaryKey LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) DEPARTMENT_ID NUMBER(5) NOT NULL MANAGER_ID NUMBER(9) NOT NULL Evaluate these two SELECT statements: 1. SELECT DISTINCT employee_id, department_id, manager_id FROM employees; 2. SELECT employee_id, department_id, manager_id FROM employees; Which of the following statements is true? Markeren voor nakijken (1) Punten The two statements will display the same data. (*) The first statement will display a particular DEPARTMENT_ID only once. The first statement will NOT display values from all of the rows in the EMPLOYEES table The second statement could display a unique combination of the EMPLOYEE_ID, MANAGER_ID, and DEPARTMENT_ID values more than once. Incorrect. See Section 17 Section 18 37. The PLAYERS table contains these columns: PLAYERS TABLE: LAST_NAME VARCHAR2 (20) FIRST_NAME VARCHAR2 (20) SALARY NUMBER(8,2)

TEAM_ID NUMBER(4) MANAGER_ID NUMBER(9) POSITION_ID NUMBER(4) You want to display all players’ names with position 6900 or greater. You want the players names to be displayed alphabetically by last name and then by first name. Which statement should you use to achieve the required results? Markeren voor nakijken (1) Punten SELECT last_name, first_name FROM players WHERE position_id >= 6900 ORDER BY last_name, first_name; (*) SELECT last_name, first_name FROM players WHERE position_id > 6900 ORDER BY last_name, first_name; SELECT last_name, first_name FROM players WHERE position_id = 6900 ORDER BY last_name DESC, first_name; Correct. 38. The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER(9) PK LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) DEPARTMENT_ID NUMBER(9) Compare these two SQL statements: 1. SELECT DISTINCT department_id DEPT, last_name, first_name FROM employees ORDER BY department_id; 2. SELECT department_id DEPT, last_name, first_name FROM employees ORDER BY DEPT; How will the results differ? Markeren voor nakijken (1) Punten One of the statements will return a syntax error. One of the statements will eliminate all duplicate DEPARTMENT_ID values.

There is no difference in the result between the two statements. (*) The statements will sort on different column values. Incorrect! See Section 18. 39. Which logical operator returns TRUE if either condition is true? Markeren voor nakijken (1) Punten OR (*) AND NOT BOTH Incorrect. See Section 18 40. Which statement about the logical operators is true? Markeren voor nakijken (1) Punten The order of operator precedence is AND, OR, and NOT. The order of operator precedence is AND, NOT, and OR. The order of operator precedence is NOT, OR, and AND. The order of operator precedence is NOT, AND, and OR. (*) Incorrect. See Section 18 Test: Final Exam Semester 1 Bekijk uw antwoorden, feedback en scores hieronder. Een asterisk (*) geeft een goed antwoord aan. Semester 1 Final Term Exam covers Sections 11-18 of Database Design. Section 18 41. From left to right, what is the correct order of Precedence? Markeren voor nakijken (1) Punten Arithmetic, Concatenation, Comparison, OR (*)

NOT, AND, OR, Arithmetic Arithmetic, NOT, Logical, Comparison Arithmetic, NOT, Concatenation, Logical Incorrect. See Section 18 42. The ORDER BY clause always comes last. True or False? Markeren voor nakijken (1) Punten Waar (*) Niet waar Correct. 43. You need to change the default sort order of the ORDER BY clause so that the data is displayed in reverse alphabetical order. Which keyword should you include in the ORDER BY clause? Markeren voor nakijken (1) Punten DESC (*) ASC SORT CHANGE Correct. 44. Which comparison condition means “Less Than or Equal To?” Markeren voor nakijken (1) Punten “=)” “+=” ” 50); Which two values could the statement return? (Choose two.) Markeren voor nakijken (1) Punten (Kies alle goede antwoorden.) 1

50 25 (*) 10 250 (*) 100 Incorrect! See Section 18. 48. You need to create a report to display all employees that were hired on or before January 1, 1996. The data should display in this format: Employee Start Date and Salary 14837 – Smith 10-MAY-92 / 5000 Which SELECT statement could you use? Markeren voor nakijken (1) Punten SELECT employee_id || – || last_name “Employee”, hire_date || / || salary “Start Date and Salary FROM employees WHERE hire_date