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.
Forexample:| 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 |
代码
# Write your MySQL query statement below
UPDATE salary SET sex=if(sex='m','f','m')