CF, > select > (case when column1 = column2 then column3 end) as alias1, > (case when column1 = column2 then column4 end) as alias2, > (case when column1 = column2 then column5 end) as alias3, > (case when column6 = column7 then column8 end) as alias4 > from > mytable
Given the information you've given us (including your first e-mail), I can't think of a better way to get the output you want than the above. You could work through subselects, etc, but I think that would be even less efficient. One thing you might want to think about is your whole approach to designing this application; it may be that you can simplify your queries by changing your table design. -- Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
