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Posted on    October-20-2010 12:00 AM

 MSSQL Server MSSQL Server 
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Rajesh Goswami

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Posted on    November-09-2010 1:00 AM

Primary Key: A column in a table whose values uniquely identify the rows in the table. A primary key value cannot be NULL.

Unique Key: Unique Keys are used to uniquely identify each row in an Oracle table. There can be one and only one row for each unique key value.

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