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 difference bet NVL and COALESCE		  New Topic  Reply to Topic
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kawadeprasad
Starting Member

13 Posts
Posted - 06/04/2012 :  06:40:46  Show Profile  Reply with Quote
Hi,
I would like to know the difference bet NVL and COALESCE.
performance wise which is better?
what are the merits and demerits of each of those?
Where it's recommended to use?

Thanks in advance!!!

-Prasad

robvolk
Most Valuable Yak

USA
15568 Posts
Posted - 06/04/2012 :  09:25:12  Show Profile  Visit robvolk's Homepage  Reply with Quote
NVL is an Oracle feature, IIRC. SQLTeam is a Microsoft SQL Server website. You can find more information on NVL here: http://www.techonthenet.com/oracle/functions/nvl.php

The most basic difference is that COALESCE can evaluate multiple replacement values, while NVL can only accept one. If there is a performance difference it's probably negligible.
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