Which key uniquely identifies each record in a relational database table?
Options
- A. Foreign Key
- B. Primary Key
- C. Candidate Key
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
B. Primary Key
Detailed Explanation
- A Primary Key uniquely identifies every record in a table.
- It cannot contain NULL values and must contain unique values.
- A table can have only one primary key constraint, which may consist of multiple columns.