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 derive primary key
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appandai
Starting Member

India
3 Posts

Posted - 11/09/2012 :  06:23:17  Show Profile  Reply with Quote
kindly help to derive primary key from two column data example primary key = studentID(nvarchar50) + date(date).
I am new to sql server

sunitabeck
Flowing Fount of Yak Knowledge

5155 Posts

Posted - 11/09/2012 :  06:54:52  Show Profile  Reply with Quote
Take a look at this page - there is a description with examples here: http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/

The two columns must be non-nullable for them to be part of the PK.
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appandai
Starting Member

India
3 Posts

Posted - 11/09/2012 :  10:07:31  Show Profile  Reply with Quote
thanks, will try
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