Question

Is it possible to combine these two queries into one query?

SELECT sum(amount) as credit FROM statement WHERE userId= '33003' AND debitOrCredit = '1' AND actionDate <= '2012-10-17';

SELECT sum(amount) as debit FROM statement WHERE userId= '33003' AND debitOrCredit = '0' AND actionDate <= '2012-10-17';

so I get the result:

| credit  | debit  |   
|   90    |   60   |

Answer 1

You could use CASE within your SUM:

SELECT sum(CASE WHEN debitOrCredit = '1' THEN amount ELSE 0 END) as credit,
       sum(CASE WHEN debitOrCredit = '0' THEN amount ELSE 0 END) as debit
FROM statement WHERE userId= '33003' AND actionDate <= '2012-10-17';