What is a primary key

Question

Biology

Gideon Hutchinson

30 May, 19:55

What is a primary key

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Answers (2)

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Raphael Patel · Answer 1

A primary key is a special relational database table column (or combination of columns) designated to uniquely identify all table records. A primary key's main features are: It must contain a unique value for each row of data. It cannot contain null values.

Anastasia Santiago · Answer 2

A primary key is a special relational database table column (or combination of columns) designated to uniquely identify all table records. A primary key's main features are: It must contain a unique value for each row of data. It cannot contain null values.