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Regarding Group by clause

 
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skumars.tripathi

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Joined: 27 May 2010
Posts: 12
Location: Kolkata

PostPosted: Thu Jul 15, 2010 4:41 pm    Post subject: Regarding Group by clause
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Is it necessary that all the columns used in agregate function should be present in the Group by clause?

For ex. If i have used some column name in the SUM function, then that should also be there in Group by clause.

Thanks in advance
Sanjay
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GuyC

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Joined: 11 Aug 2009
Posts: 1281
Location: Belgium

PostPosted: Thu Jul 15, 2010 4:53 pm    Post subject:
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No , exactly the opposite : all selected columns NOT in aggregate functions must be in the group by clause.
well, kind of. it gets more complicated when using functions like substr() , year(),...
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