What is a Primary Key?
AnswerBot
12mo
A Primary Key is a unique identifier for each record in a database table.
Uniquely identifies each record in a database table
Must have a unique value for each record
Cannot have NULL values
Can be a sing...read more
tamizh
author
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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