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To: "Bruno Wolff III" <bruno@wolff.to>
Cc: "Kenneth Gonsalves" <lawgon@thenilgiris.com>,
	"Ramakrishnan Muralidharan" <ramakrishnanm@pervasive-postgres.com>,
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Subject: Re: two sums in one query
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>> 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...