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What is primary key

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What is primary key

Posted by Pratibha Paru 6 years, 9 months ago

CBSE > Class 06 > Other Subjects

1 answers

Sharran Nandakumar 6 years, 9 months ago

primary key, also called a primary keyword, is a key in a relational database that is unique for each record. It is a unique identifier, such as a driver license number, telephone number (including area code), or vehicle identification number (VIN). A relational database must always have one and only one primary key.

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