Hi all, I have a problem using aggregate function SUM() ... The platform is PostgreSQL 6.5.2 on i386-unknown-freebsd3.2, compiled by gcc 2.7.2.1 . The story is that I need to join two tables with an aggregate function. Here is a sample model : Table A consist of ( fa1 , fa2 ) Table B consist of ( fb1 , fb2 ) Table C consist of ( fc1 , fc2 ,fc3 ) I want to write a query which looks like this : select fa1 - sum(fc3) from A,B,C where fa1=fb1 and fb2=fc2 group by fa1 ; unfortunately I get this in result: ERROR: Illegal use of aggregates or non-group column in target list Any idea ? How can I have my result with only one SQL statement ? Thanks in advance Omid Omoomi _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
