LeetCode: Swap Salary Posted on February 12, 2018July 26, 2020 by braindenny Swap Salary Similar Problems: CheatSheet: SQL & MySql CheatSheet: Leetcode For Code Interview CheatSheet: Common Code Problems & Follow-ups Tag: #sql 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 | Github: code.dennyzhang.com Credits To: leetcode.com Leave me comments, if you have better ways to solve. ## https://code.dennyzhang.com/swap-salary update salary set sex = case when sex = 'm' then 'f' when sex = 'f' then 'm' end; Post Views: 5