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What is the primary key in a database?
Questioner：Isabella Lee 2023-05-05 16:07:26
The most authoritative answer in 2024
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Oliver White——Works at the International Renewable Energy Agency, Lives in Abu Dhabi, UAE.
A 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.read more >>+119962023-05-12 16:07:26
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