Computer Science · Database Management Systems
In database design, the primary key constraint states that:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A table cannot have more than one candidate key
- 2A table cannot have both a primary key and a foreign key
- 3The value of a foreign key cannot be null
- 4The value of the primary key must be unique and non-null in all tuples✓
Correct answer
The value of the primary key must be unique and non-null in all tuples
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