On 23.10.2017 at 14:37, j...@acousticdesign.co.uk [firebird-support] wrote: > I have a stored procedure along the lines of > SELECT ID, Amount1, Amount2 .. > FROM Table1. > UNION > SELECT ID, Amount1, Amount2... > FROM Table2 > ORDER BY 1 > Is it possible to construct a conditional ORDER By clause that orders by > Amount1 under certain conditions, and order by Amount2 under other conditions? >
Try something like this: select iif(your condition, Amount1, Amount2) as SORTCOL, ID, Amount1, Amount2, ... from Table1 union select iif(your condition, Amount1, Amount2) as SORTCOL, ID, Amount1, Amount2, ... from Table2 order by 1 If there are more than two possible candidates for the ordering column, you can switch from iif to case - when - end. have a good one Tomasz -- __--==============================--__ __--== Tomasz Tyrakowski ==--__ __--== SOL-SYSTEM ==--__ __--== http://www.sol-system.pl ==--__ __--==============================--__
