SQL 627 Swap Salary
2022/9/14 2:18:23
本文主要是介绍SQL 627 Swap Salary,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
Table: Salary
+-------------+----------+ | Column Name | Type | +-------------+----------+ | id | int | | name | varchar | | sex | ENUM | | salary | int | +-------------+----------+
id is the primary key for this table.
The sex column is ENUM value of type ('m', 'f').
The table contains information about an employee.
Write an SQL query to swap all 'f' and 'm' values (i.e., change all 'f' values to 'm' and vice versa) with a single update statement and no intermediate temporary tables.
Note that you must write a single update statement, do not write any select statement for this problem.
Solution
这里使用 \(SET\),具体用法见代码
点击查看代码
UPDATE Salary SET sex= (case WHEN sex='f' THEN 'm' ELSE 'f' end)
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