Referential ____ means that if the foreign key contains a value,that value refers to an existing valid tuple (row) in another relation.
A) integrity
B) uniqueness
C) direction
D) relations
Correct Answer:
Verified
Q22: _, also known as RESTRICT, yields values
Q42: _ yields a vertical subset of a
Q43: The _ constraint can be placed on
Q44: The _ is actually a system-created database
Q45: Controlled _ makes a relational database work.
A)
Q48: A CUSTOMER table's primary key is CUS_CODE.The
Q49: A _ key can be described as
Q50: The equijoin takes its name from the
Q51: All primary key entries are unique,and no
Q52: _ combines all rows from two tables,excluding
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