Question

what is the use of primary key..

Answer 1

to find shortcut u r word.ok

Answer 2

Hi dear here is your answer

A primary key is used to ensure data in the specific column is unique. You can only set constraints with primary keys, by setting a foreign key to another column which creates a relationship with the column that has the primary key set. A prime use of a primary keyis in the case of a users table.Jul 25, 2012


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