On Fri, Jul 08, 2005 at 16:49:44 +0200, PFC <[EMAIL PROTECTED]> wrote: > > >>SELECT (SELECT sum(amount) FROM table WHERE debit=X) AS debit, (SELECT > >>sum(amount) FROM table WHERE credit=x) AS credit; > > > >If most of the records are credits or debits you don't want to do this. > >A single sequential scan through the table will be the best plan. > > I thought that debit = source account # and credit = dest account #, > and there are a lot of different account...
You aren't likely to see a significant speed up in that case either. ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
