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group by for dynamic column

Author

Topic

noamg
Posting Yak Master

215 Posts

Posted - 2005-02-14 : 04:24:10

I need the following idea, how to do without dynamic-sql ?

SELECT Status,
'SortField'=CASE
WHEN @Type = 1 THEN enumI WHEN @Type = 2 THEN enumM
WHEN @Type = 3 THEN enumP
END,
'EXPR1' = CASE
WHEN @Type = 1 THEN COUNT( enumI )
WHEN @Type = 2 THEN COUNT( enumM )
WHEN @Type = 3 THEN COUNT( enumP )
END
FROM Reports R
LEFT OUTER JOIN ReportsDetails RD
ON RD.ReportID = R.ReportID
GROUP BY RD.Status, SortField

thamks

Noam Graizer

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2005-02-14 : 05:58:49

What does @type refer to?

Madhivanan

LarsG
Constraint Violating Yak Guru

284 Posts

Posted - 2005-02-14 : 07:35:56

Repeat the case expression in the group by clause.


SELECT Status,
CASE
WHEN @Type = 1 THEN enumI
WHEN @Type = 2 THEN enumM
WHEN @Type = 3 THEN enumP
END as sortField,
CASE
WHEN @Type = 1 THEN COUNT( enumI )
WHEN @Type = 2 THEN COUNT( enumM )
WHEN @Type = 3 THEN COUNT( enumP )
END as expr1
FROM Reports R
LEFT OUTER JOIN ReportsDetails RD
ON RD.ReportID = R.ReportID
GROUP BY RD.Status, CASE
WHEN @Type = 1 THEN enumI WHEN @Type = 2 THEN enumM
WHEN @Type = 3 THEN enumP end

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