Question

I have a table balances with the following columns:

bank | account | date | amount 

I also have a table accounts that has bank and account as its composite primary key.

I want to do a query like the following pseudocode:

select date, sum(amount) as amount from balances where  bank and account in (list of bank and account pairs) group by date 

The list of bank-account pairs is supplied by the client. How do I do this? Create a temp table and join on it?

I’m using Sybase

Answer 1

If bank account pairs is known in you app you just write:

(bank = 1 AND account = 2) OR (bank = 3 AND account = 4) OR ... 

If list of bank account pairs is a subquery, then write something like this:

SELECT * FROM balances b LEFT JOIN bank_account_pairs p ON ... WHERE b.bank = p.bank AND b.account = p.account AND ...