SQL更新一列[关闭]答案

【问题标题】：SQL Update a column [closed]SQL更新一列[关闭]
【发布时间】：2021-09-14 15:35:21
【问题描述】：

我想根据同一张表中的另一列更新一列 1 和 0。下面提到的查询导致错误，是什么问题？

**UPDATE A SET [Employee Size Less than 100] = SELECT CASE WHEN [Employee Size]

UPDATE A SET [Employee between 100 and 200] = SELECT CASE WHEN ([Employee Size] > 100 AND [Employee Size]

【问题讨论】：

您要更新哪一栏？您的查询更新了 2 列：[Employee Size Less Than 100] 和 [Employee Between 100 and 200]。

【解决方案1】：

您不需要子查询：

UPDATE A
    SET [Employee Size Less Than 100] = (CASE WHEN [Employee Size] <= 100 THEN 1 ELSE 0 END);

【讨论】：