Home > DeveloperSection > Interviews > What is a "primary key"?

Posted on    October-25-2010 12:00 AM

 MSSQL Server MSSQL Server 
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Pushpendra Singh

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Posted on    November-01-2010 12:00 AM

Primary Key is a type of a constraint enforcing uniqueness and data integrity for each row of a table. All columns participating in a primary key constraint must possess the NOT NULL property.

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