Performing mathematical operations in MySQL IF then ELSE is possible?

For performing mathematical operations and working with conditions, you can consider CASE statement. Let us first create a table −

mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FruitName varchar(100),    FruitPrice int    ); Query OK, 0 rows affected (0.26 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(FruitName,FruitPrice) values('Orange',250); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(FruitName,FruitPrice) values('Banana',100); Query OK, 1 row affected (0.05 sec) mysql> insert into DemoTable(FruitName,FruitPrice) values('Apple',150); Query OK, 1 row affected (0.05 sec) mysql> insert into DemoTable(FruitName,FruitPrice) values('Pomegranate',200); Query OK, 1 row affected (0.10 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+----+-------------+------------+ | Id | FruitName   | FruitPrice | +----+-------------+------------+ |  1 | Orange      |        250 | |  2 | Banana      |        100 | |  3 | Apple       |        150 | |  4 | Pomegranate |        200 | +----+-------------+------------+ 4 rows in set (0.19 sec)

Following is the query for CASE statement with mathematical operations −

mysql> select Id,FruitName,FruitPrice,    case    when FruitName='Orange'    then FruitPrice/5    else FruitPrice    end as OriginalPrice    from DemoTable;

This will produce the following output −

+----+-------------+------------+---------------+ | Id | FruitName   | FruitPrice | OriginalPrice | +----+-------------+------------+---------------+ |  1 | Orange      |        250 |       50.0000 | |  2 | Banana      |        100 |           100 | |  3 | Apple       |        150 | 150 | |  4 | Pomegranate |        200 | 200 | +----+-------------+------------+---------------+ 4 rows in set (0.00 sec)