Computer Science, asked by ranaabrarminhas, 1 year ago

What should be necessary when setting a primary key in database?

Answers

Answered by shiv7020
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'smain features are: It must contain a unique value for each row of data. It cannot contain null values.
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