FInal Exam Oracle Academy Database Design

 

1.

Which of the following is a valid reason for considering a Subtype Implementatio n?

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 "he resulting resulting table will reside reside in a single database database and be used by #ust $%& user'  "he common access access paths for the the supertypes are dierent' )usiness functionality* business rules* access paths* and fre+uency of access are all very dierent between the subtypes' (, Most of the relationships are at the supertype level' -orrect 2.  "he

transformation from an &R diagram to a physical design transformation design involves changing terminology' Secondary .ni+ue Identi/ers become

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-olumns  "ables  " ables .ni+ue -onstraints (, !rimary 0ey -onstraints -orrect 3.

ttributes become tables in a database' "rue or 2alse?

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 "rue  " rue 2alse (, ( , -orrect 4.

In an $racle database* why would 13" 13")4& )4& not work as a table name?

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 "he database does does not understand understand all capital letters' letters'  "here is no problem here' here' 5ou 5ou can create create a table called 13")4&' $b#ect names must not start with a number' "hey must begin with a letter' (,  ")4&  " )4& is a reserved reserved word'

 

-orrect 5.  "he

te6t below below is an e6ample e6ample of what constraint constraint type?

If the number of )$$0S lent to a )$RR$W&R in the 4I)RR5 e6ceeds 7* then we must send him a letter re+uesting the return of the )$$0S8 this will re+uire e6tra programming to enforce'

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&ntity integrity .ser9de/ned integrity (, -olumn integrity Referential integrity Incorrect' Refer to Section 11 4esson 1' 6.

2oreign keys must be null' "rue or 2alse?

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 "rue  " rue 2alse (, ( , -orrect 7.

 foreign key cannot refer to a primary key in the same table' "rue or 2alse?

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 "rue  " rue 2alse (, ( , -orrect 8.

&ntity integrity refers to:

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 "ables  " ables always containing containing te6t data  "ables  " ables always containing containing numeric data -olumns having !rimary 0eys* 2oreign 0eys* .ni+ue 0eys* and -heck constraints de/ned in the database'  "ables  " ables having !rimary 0eys* 0eys* 2oreign 2oreign 0eys* 0eys* .ni+ue 0eys* 0eys* and -heck constraints de/ned in the database' (, Incorrect' Refer to Section 11 4esson 1'

 

9.

 table must have at least one candidate key* as well as its primary key' "rue or 2alse?

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 "rue  " rue 2alse (, ( , -orrect 10.

It is possible to implement non9transferability non9transferability via a simple 2oreign 0ey Relationship' "rue or 2alse?

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 "rue  " rue 2alse (, ( , -orrect 11. "  "o o

resolve a many many to

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many relationship in a physical model you create a;an  33333333333333  3333333 333333333333? 33333?

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.ni+ue key constraints Intersection entity Intersection table (,  "wo tables with 2oreign  "wo 2oreign key key constraints between between them -orrect

Section 12

(nswer all +uestions in this section 12.

$nce you have created a table* it is not possible to alter the de/nition of it' If you need to add a new column you must delete the table de/nition and create a new* correct table' "rue or 2alse?

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 "rue  " rue 2alse (, -orrect' 13.

 "he f3customers f3customers table contains the following data: data: ID Name Address City State Zi Zip

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1

Cole Bee

123 Main Street

Orlando FL

2

Zoe T T ee

1!!" O Olli#er A A# #en$e Boston

3

Sandra Lee 22 Main Street

Tampa

32838

MA !211% FL

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32&&&

If you run the following statement:  @8 =ow many rows will be left in the table?

A B 1 (, @ -orrect' 14.

In the nalysis phase* the tables are created and populated with test data' "rue or 2alse?

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 "rue  " rue 2alse (, -orrect' 15.