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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