MySQL || simply short code
\nUPDATE Salary \nSET sex = CASE WHEN sex = \'f\' THEN \'m\'\n               WHEN sex = \'m\' THEN \'f\'\n          END;\n
```\nUPDATE Salary \nSET sex = CASE WHEN sex = \'f\' THEN \'m\'\n               WHEN sex = \'m\' THEN \'f\'\n          END;\n```
['MySQL']