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Perform SUM and SUBTRACTION on the basis of a condition in a single MySQL query?
For this, use CASE statement and set for both SUM and SUBTRACTION. Let us first create a table −
mysql> create table DemoTable866( Status varchar(100), Amount int ); Query OK, 0 rows affected (0.63 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable866 values('ACTIVE',50);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable866 values('INACTIVE',70);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable866 values('INACTIVE',20);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable866 values('ACTIVE',100);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable866 values('ACTIVE',200);
Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −
mysql> select *from DemoTable866;
This will produce the following output −
+----------+--------+ | Status | Amount | +----------+--------+ | ACTIVE | 50 | | INACTIVE | 70 | | INACTIVE | 20 | | ACTIVE | 100 | | ACTIVE | 200 | +----------+--------+ 5 rows in set (0.00 sec)
Following is the query to perform SUM or SUBTRACTION in the same column with a single MySQL query −
mysql> select sum(CASE WHEN Status = 'ACTIVE' then Amount WHEN Status = 'INACTIVE' then -Amount END) AS RemainingAmount from DemoTable866;
This will produce the following output −
+-----------------+ | RemainingAmount | +-----------------+ | 260 | +-----------------+ 1 row in set (0.06 sec)
Updated on: 03-Sep-2019
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