SQL select语句在where子句中 | select语句在where子句中

本文介绍了SQL select语句在where子句中的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

您好，我正在尝试执行查询，但似乎无法正确执行.

Hi there I am trying to execute a query but cannot seem to get it right.

SELECT *
FROM   table
WHERE  id IN (SELECT *
              FROM   table
              WHERE  description = 'A')
AND description = 'B'

上面是我得到的查询，select * from table where description = A在单独运行时按预期工作，我只需要使where子句起作用，这样我就可以看到具有A和B描述的任何ID.

Above is the query that I have got, the select * from table where description = A works as expected when ran alone I just need to make the where clause to work so I can see any id that has a description of A and B.

推荐答案

当我假设只需要id列时，您将从子查询中获取多个列:

You will be getting multiple columns from the sub query when I assume you only want the id column:

SELECT *
FROM   table
WHERE  id IN (SELECT id
          FROM   table
          WHERE  description = 'A')
   AND description = 'B'

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