Your approach got me thinking and I came up with a modification of my original proc that seems to give me what I want
SELECT main.*, main.credits- main.debits - main.creditedamt as balance FROM
( SELECT
credits = (SELECT SUM(ac.yamount)
FROM account_credits ac
WHERE ac.cinmates_id = @cinmates_id) ,
debits = (SELECT sum(ad.yamount)
from account_debits ad
WHERE ad.cinmates_id=@cinmates_id) ,
creditedamt = (SELECT sum(ad.ycreditedamt)
from account_debits ad
WHERE ad.cinmates_id=@cinmates_id )
) main
I will continue to study the CROSS JOIN as I'm sure there is something in there I need to add to my arsenal as well.
>Hi Charles,
>
>You can use derived table to add a calculated column. Try
>
>SELECT *, credits-debits-creditedamt AS balance
> FROM (
> SELECT SUM(ac.yamount) AS credits
> FROM account_credits ac
> CROSS JOIN (
> SELECT sum(ad.yamount) AS debits,
> sum(ad.ycreditedamt) AS creditedamt
> FROM account_debits ad
> WHERE ad.cinmates_id=@cinmates_id
> ) dbt
> WHERE ac.cinmates_id = @cinmates_id)
> ) sm
>
>I feel that it can be improved but nothing else comes to mind at the moment.
>
>>
SELECT
>> credits = (SELECT SUM(ac.yamount)
>> FROM account_credits ac
>> WHERE ac.cinmates_id = @cinmates_id) ,
>> debits = (SELECT sum(ad.yamount)
>> from account_debits ad
>> WHERE ad.cinmates_id=@cinmates_id) ,
>> creditedamt = (SELECT sum(ad.ycreditedamt)
>> from account_debits ad
>> WHERE ad.cinmates_id=@cinmates_id )
>>
>>
>>In the above stored proc I would like to add a 4th colum which is balance=credits-debits-creditedamt
>>
>>Would also appreciate any insights as to other ways to design this select.
>>
Charles Hankey
Though a good deal is too strange to be believed, nothing is too strange to have happened.
- Thomas Hardy
Half the harm that is done in this world is due to people who want to feel important. They don't mean to do harm-- but the harm does not interest them. Or they do not see it, or they justify it because they are absorbed in the endless struggle to think well of themselves.
-- T. S. Eliot
Democracy is two wolves and a sheep voting on what to have for lunch.
Liberty is a well-armed sheep contesting the vote.
- Ben Franklin
Pardon him, Theodotus. He is a barbarian, and thinks that the customs of his tribe and island are the laws of nature.
