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Each GROUP BY expression must contain at least one column that is not an outer reference

Posted on 2011-03-14
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Last Modified: 2012-05-11
Hello,
I need help understanding why the following code fails with an error message of
Msg 164, Level 15, State 1, Procedure spDistributionTableSupportTeamInsert, Line 6
Each GROUP BY expression must contain at least one column that is not an outer reference.
I did fix it after doing some research by removing @TASKORDER from the group by clause - so it is now working fine.  However, I'd like to learn why its inclusion in the group by clause caused the code to fail.  

CREATE PROCEDURE spDistributionTableSupportTeamInsert
@TASKORDER  nvarchar(50)
AS

INSERT INTO Distribution
(TaskOrder,Name, LName, OBS, Department, [Function], InitialPostedDate, LastPostedDate, 
 EligibilityStatus, [Description], Contribution, DistributionAmt)

SELECT   @TASKORDER  , [Name], [LName], [OBS], [Department], [Function], Min([MinOfInitialPostedDate]), 
		 Max([MaxOfLastPostedDate]), [EligibilityStatus], [Description],  [Contribution], 
		 [DistributionAmt] FROM vwRolledUpSupportTeam WHERE [TaskOrder] <> @TASKORDER		 
		 AND [Name] NOT IN (SELECT [Name] FROM vwShareAllocation WHERE [TaskOrder] = @TASKORDER)
         GROUP BY @TASKORDER, [Name], [LName], [OBS], [Department], [Function], [EligibilityStatus], 
         [Description],  [Contribution], [DistributionAmt]

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Question by:chtullu135
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4 Comments
 
LVL 26

Expert Comment

by:Shaun Kline
ID: 35131362
Try giving your @TASKORDER field in the SELECT clause a name, and then use that name in place of @TASKORDER in the GROUP BY. My guess is that the GROUP BY does not like variables.
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LVL 56

Expert Comment

by:HainKurt
ID: 35131690
try this:

ie, no need to add parameter to group since it is fixed...
SELECT   @TASKORDER  , [Name], [LName], [OBS], [Department], [Function], Min([MinOfInitialPostedDate]), 
		 Max([MaxOfLastPostedDate]), [EligibilityStatus], [Description],  [Contribution], 
		 [DistributionAmt] FROM vwRolledUpSupportTeam WHERE [TaskOrder] <> @TASKORDER		 
		 AND [Name] NOT IN (SELECT [Name] FROM vwShareAllocation WHERE [TaskOrder] = @TASKORDER)
         GROUP BY [Name], [LName], [OBS], [Department], [Function], [EligibilityStatus], 
         [Description],  [Contribution], [DistributionAmt]

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Author Comment

by:chtullu135
ID: 35138366
HainKurt

I did what you suggested before I posted the question and it worked.  I wanted to know the reason why it worked.  

Shaun_Kline:

I agree that the group by doesn't like variables.  I'm trying to understand why
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LVL 56

Accepted Solution

by:
HainKurt earned 500 total points
ID: 35138619
You can group by only fields or expression containing some column
and there is no reason adding some fixed value to grouping, just it does not make any sense... just add that value to select part...
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