Asked in TCS and 32 others
What is a primary key in a database?
AnswerBot
9d
A primary key uniquely identifies each record in a database table, ensuring data integrity and efficient retrieval.
A primary key must contain unique values for each record.
It cannot contain NULL value...read more
tamizh
1y
student at
Meenakshi college of Engineering
It is used to identify the record uniquely from the table primary key is a combination of unique and not null
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