Re: Poor Query

Pierre-Frédéric Caillaud wrote:

>
> Your suffering comes from the "where ba.bankaccountID =
> u.bankaccountID" in the subselect. It means postgres has to run the
> subselect once for each row in Users. You want the subselect to run
> only once, and return one (or more?) bankaccountid's, then fetch the
> users from Users.
>
> Just remove the "where ba.bankaccountID = u.bankaccountID" !
>
>> select userID, fname, lname, email, phone, dateEntered, dateCanceled,
>> dateSuspended, billAmount, billDate, dateBilled, datePaid, '?' as
>> searches
>> from Users u
>> where bankaccountid in (select bankaccountid
>> from bankaccount ba
>> where ba.bankaccountID = u.bankaccountID
>> and ba.accountnumber = '12345678'
>> and ba.routingNumber = '12345678')
>> order by UserID desc
>> limit 500
>
>
> New version :
>
> select userID, fname, lname, email, phone, dateEntered, dateCanceled,
> dateSuspended, billAmount, billDate, dateBilled, datePaid, '?' as
> searches
> from Users u
> where bankaccountid in (select bankaccountid
> from bankaccount ba
> WHERE ba.accountnumber = '12345678'
> and ba.routingNumber = '12345678')
>
> You could also do this :
>
> select u.* from Users u, bankaccount ba
> where u.bankaccountid = ba.bankaccountid
> and ba.accountnumber = '12345678'
> and ba.routingNumber = '12345678')
>
>
>
Thanks! a lot that was it , it is way much better now.