Can I use SUM() with IF() in MySQL?

Yes, you can use SUM() with IF() in MySQL. Let us first create a demo table:

mysql> create table DemoTable (    Value int,    Value2 int ); Query OK, 0 rows affected (0.51 sec)

Following is the query to insert some records in the table using insert command:

mysql> insert into DemoTable values(100,400); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(100,400); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(400,100); Query OK, 1 row affected (0.14 sec)

Following is the query to display records from the table using select command:

mysql> select *from DemoTable;

This will produce the following output

+-------+--------+ | Value | Value2 | +-------+--------+ |   100 |    400 | |   100 |    400 | |   400 |    100 | +-------+--------+ 3 rows in set (0.00 sec)

Following is the query to use SUM() along with IF() that calculates how many 100s and 400s are in the above table:

mysql> SELECT SUM(IF(Value=100, 1, 0) + IF(Value2=100, 1, 0)) as Hundred, SUM(IF(Value=400, 1, 0) + IF(Value2=400, 1, 0)) as FourHundred FROM DemoTable;

This will produce the following output:

+---------+--------------+ | Hundred | FourHundred | +---------+--------------+ |       3 | 3 | +---------+--------------+ 1 row in set (0.00 sec)