Re: Condition in a calculated field

I just watched the documentation and did what you suggested but I am still getting the same error message. I did the following test, what is wrong?

HAVING 

  facturas.fce_valor_comercial > total

WHERE clause is pre-grouping.

What you want is the HAVING clause - though you have to repeat the
expression (e.g., col > sum(...) ) as opposed to referring to it by name
(e.g., col > total).

http://www.postgresql.org/docs/devel/static/sql-select.html

David J.