A ___________ key value must match an existing primary key value or unique key value.
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Keep practicing — related questions
- The UNIQUE constraint requires that values must be
- A primary key _________.
- A foreign key:
- A PRIMARY KEY must
- What is required of a primary key? (Select all that apply)
- With reference to a table which key resides in another table?
- The constraint used to avoid keying in repeated values into a column must be declared_____________.
- The union of primary keys of the related entity sets becomes a _________.