On 2015-04-01 01:50 AM, Bart Smissaert wrote: > Say I have a table with 3 fields. Depending on a value in field 1 (this > value will be either 1 or 2) > I want to do a different sort order sorting on fields 2 and 3. > This will be either order by field2 desc, field3 desc or field3 desc, > field2 desc. > I thought of a union, but doesn't allow this. > Any suggestions?
Well, this is technically impossible (influencing an SQL statement from the values returned from that statement is impossible for obvious reasons). But, if you do this: SELECT Field1, Field2, Field3, Field4, (CASE Field1 WHEN 1 THEN Field2 ELSE Field3) AS Sort1, (CASE Field1 WHEN 0 THEN Field2 ELSE Field3) AS Sort2 FROM SomeTable WHERE 1 ORDER BY Sort1, Sort2; You should achieve the exact result. NOTE: This is a really really bad way of doing things, the sort order should not be determined like this in any sane system - those settings should live in a DB or at least a table outside of the data being inspected.
