From: PFC <lists@boutiquenumerique.com>
To: Bruno Wolff III <bruno@wolff.to>
Cc: Kenneth Gonsalves <lawgon@thenilgiris.com>
Cc: Ramakrishnan Muralidharan <ramakrishnanm@pervasive-postgres.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: two sums in one query
Date: Fri, 08 Jul 2005 16:49:44 +0200
Message-ID: <op.stlng6uhth1vuj@localhost> (raw)
In-Reply-To: <20050708140725.GA22725@wolff.to>
References: <02767D4600E59A4487233B23AEF5C5992A4093@blrmail1.aus.pervasive.com>
<200507081306.08597.lawgon@thenilgiris.com>
<op.stlkoiq4th1vuj@localhost>
<20050708140725.GA22725@wolff.to>
>> 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...
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To: pgsql-sql@postgresql.org
Cc: lists@boutiquenumerique.com, bruno@wolff.to, lawgon@thenilgiris.com, ramakrishnanm@pervasive-postgres.com
Subject: Re: two sums in one query
In-Reply-To: <op.stlng6uhth1vuj@localhost>
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