Variable ORDER BY - SQL Server Forums

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Variable ORDER BY

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AskSQLTeam
Ask SQLTeam Question

0 Posts

Posted - 2004-12-17 : 13:24:16

David writes "Hi

I am attempting to use a variable ORDER BY clause but am being defeated because of the use of DISTINCT in the select line. This is a simplified version:

DECLARE @FirstSortOrder nvarchar(50)
SET @FirstSortOrder = 'CSurname'

SELECT DISTINCT ContactNumber, CSurname FROM Delegate
ORDER BY CASE WHEN @FirstSortOrder = 'CSurname' THEN CSurname END

This gives an error:

ORDER BY items must appear in the select list if SELECT DISTINCT is specified.

The same query without the DISTINCT works fine as descrived in a Forum on this site. The real query links 4 tables together and the DISTINCT is neccessary, and the ORDER BY has a two level order based on CASE statements. All of which works fine until the DISTINCT is introduced.

ANy help would be appreciated.

David"

X002548
Not Just a Number

15586 Posts

Posted - 2004-12-17 : 13:33:55

SELECT * FROM (
SELECT DISTINCT ContactNumber, CSurname FROM Delegate) AS XXX
ORDER BY CASE WHEN @FirstSortOrder = 'CSurname' THEN CSurname END

Brett

8-)

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