Give one advantageWhat is primary key? – InterviewSolution

InterviewSolution

1.	Give one advantageWhat is primary key?
Answer» Aprimary key, also called aprimarykeyword, is akeyin 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 oneprimary key.

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