Comments on: Dynamic ordering with T-SQL

By: Tony

Tony — Mon, 29 Dec 2008 11:27:48 +0000

Thanks for this! Saved me a lot of time and headaches!

By: Rob Farley

Rob Farley — Wed, 21 May 2008 17:36:11 +0000

Yes Reji, I should’ve mentioned that if you want Descending, you need to put that outside the CASE statement, and if you want to pass that in as an option, then you’ll need an extra CASE for each one.

By: REJI P R

REJI P R — Wed, 21 May 2008 09:14:34 +0000

This query cause a problem when we want to sort in DESC Order ….For that purpose Query must be like
SELECT custid, custname
FROM Customers
ORDER BY
CASE WHEN @SortColumn = ‘custname’ THEN custname END DESC

CASE WHEN @SortColumn = ‘custid’ THEN custid END DESC

By: Rob Farley

Rob Farley — Mon, 19 May 2008 17:27:35 +0000

Daniel – can you explain what you mean here? If neither condition is satisfied and you sort by NULL, NULL, then that’s perfectly legal. It just won’t produce the data in a known order (it’ll use whichever order it access the data).

By: Daniel Godoy

Daniel Godoy — Mon, 19 May 2008 13:00:34 +0000

Isnt there a risk of generating system comands with the leveraging of null values… What if 2 nulls occur in a row… Can that be inturpreted as an end of test by the system? not too sure what happens under the hood of SQL2k5 but from a programming perspective… just a thought…