Question

I have below two query’s SUM the values
Query1:*

SELECT SUM(price) FROM TABLE1 WHERE acc_id = ‘555’

Query2:

SELECT SUM(price) FROM TABLE2 WHERE account = ‘555’ && active=’1′

I try to combine this two query but give wrong sum result , for example if query1 sum is: -86500 and Query2 sum is: 76000 , RESULT must be -10500 but result shown with a number like -486000

I’m trying like this, but i’m not getting expected result.

SELECT SUM(t1.price + t2.price) AS TotalCredit 
FROM TABLE1 AS t1, TABLE2 AS t2 
WHERE t1.`acc_id` = '555' && t2.`Account`='555' && t2.`Active`='1'

Table image :

Answer 1

Due to join the number of records get duplicated and you get a higher value for sum
try this

SELECT sum(prc) 
FROM (
    SELECT SUM(price) prc FROM TABLE1 WHERE acc_id = '555'
    union all 
    SELECT SUM(price) prc FROM TABLE2 WHERE account = '555' && active='1'
) a