Primary Key
A superkey which has a set of attributes whose values ensure the unique identification of the rows in a table. It is the principal means of identifying tuples in a relation. Its value is never, or at most rarely, changed.
- ส่วนหนึ่งของคำพูด: proper noun
- อุตสาหกรรม/ขอบเขต: Software
- Category: Database applications
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- paul01234
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