[leetcode]627. Swap Salary

Given a table salary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f values to m and vice versa) with a single update query and no intermediate temp table.

For example:

| id | name | sex | salary ||----|------|-----|--------|| 1  | A    | m   | 2500   || 2  | B    | f   | 1500   || 3  | C    | m   | 5500   || 4  | D    | f   | 500    |

After running your query, the above salary table should have the following rows:

| id | name | sex | salary ||----|------|-----|--------|| 1  | A    | f   | 2500   || 2  | B    | m   | 1500   || 3  | C    | f   | 5500   || 4  | D    | m   | 500    |

Solution:

# Write your MySQL query statement below
update salary set sex=IF(sex='m','f', 'm')