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SQL Server TKPROF interface...

Posted on 2010-08-30
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I am trying to demonstrate to coders that correct approaches are priceless and in Oracle this is very simple.  SQL Server not so much (for me of course).

If you execute:

SELECT
  GETDATE()
, GETDATE()
, GETDATE()

that should have a very different "detailed" execution plan than

declare
  @v_Sysdate               as   smalldatetime    = GETDATE;

SELECT
  @v_Sysdate
, @v_Sysdate
, @v_Sysdate

Just trying to show the folks the internals so say, "hey, this is more maintainable, scalable, performance oriented, etc."

How can I do this?  How do I show that SQL Server would only get sysdate once (well GETDATE() once in SQL Server) with the declaration and 3 times with the first query?

Maybe this isn't the best example but I am trying to illustrate from a simple query to get these folks on board with correct coding paradigms.

Please help me illustrate how this is accomplished in SQL Server.

Thanks in advance,

B
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Question by:cyimxtck
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1 Comment
 
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Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 33557972
in sql server, you check the explain plan.

other settings:
SET SHOWPLAN_ALL ON
http://msdn.microsoft.com/en-us/library/ms187735.aspx

SET STATISTICS TIME ON
http://msdn.microsoft.com/en-us/library/ms190287.aspx

SET STATISTICS IO ON
http://msdn.microsoft.com/en-us/library/ms184361.aspx


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