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What is primary key

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What is primary key

    • Posted by Pratibha Paru 7 years, 10 months ago

    CBSE > Class 06 > Other Subjects
    • 1 answers

    Sharran Nandakumar 7 years, 10 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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