A(n)____________________ key can be described as a superkey without unnecessary attributes.
Correct Answer:
Verified
Q44: In a database context, the word _
Q52: To avoid nulls, some designers use special
Q53: The relational operators have the property of
Q54: PRODUCT yields all possible pairs of rows
Q64: The _ relational type is the "relational
Q65: In the relational model,_ are important because
Q67: The following example exhibits _ integrity:
The CUSTOMER
Q68: When you define a table's primary key,the
Q72: A(n)_ is an ordered arrangement of keys
Q73: If the foreign key contains either matching
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