Question

3 Any shared subtype member must exist in all of its superclasses. * (2 Points) True False 4 Trying to insert a value in a foreign key that references a primary key value that does not exist in the referenced relation is considered a violation of Referential integrity * (2 Points) True False

          3
Any shared subtype member must exist in all of its superclasses. *
(2 Points)
True
False
4
Trying to insert a value in a foreign key that references a primary key value that does not exist
in the referenced relation is considered a violation of Referential integrity *
(2 Points)
True
False

3
Any shared subtype member must exist in all of its superclasses. *
(2 Points)
True
False
4
Trying to insert a value in a foreign key that references a primary key value that does not exist
in the referenced relation is considered a violation of Referential integrity *
(2 Points)
True
False

Added by Brandon J.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Tanvi Garg

Step 1

Any shared subtype member must exist in all of its superclasses." This statement is saying that if a shared subtype member exists in a relation, it must also exist in all of its superclasses. This is true because referential integrity ensures that all foreign key Show more…

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False or True (2 Points) False or True (2 Points) If in the referenced relation is considered a violation of Referential integrity. Any shared subtype member must exist in all of its superclasses. Trying to insert a value in a foreign key that references a primary key value that does not exist.