Question

我想删除与子查询匹配的表中的所有记录，如下所示：

delete from device where clientMac =   (select * from device  where clientMac = '80:d6:05:02:1d:b9');

我收到了这个错误：

错误代码1241：操作数应包含1列

我也想避免：

错误1093：您无法在FROM子句
中指定要更新的目标表

Answer 1

你必须使用IN

DELETE FROM device WHERE clientMac IN (SELECT clientMac FROM device where clientMac='80:d6:05:02:1d:b9')

Answer 2

如果我理解您的查询，那么您的查询不需要子查询。请看这个：

DELETE FROM device WHERE clientMac IN（SELECT clientMac FROM device where clientMac = '80：d6：05：02：1d：b9'）

等同于：

DELETE FROM device WHERE clientMac = '80：d6：05：02：1d：b9';

我认为你想要实现别的目标。请确认。

Answer 3

错误是由于列不匹配造成的。您的选择查询必须只返回 clientMac 列，如果预期有多个结果，则使用IN Query，如下所示

delete from device where clientMac IN (select clientMac from device where clientMac = '80:d6:05:02:1d:b9');

Answer 4

delete from device 
where clientMac in (
      select * from 
      (select clientMac  from device where clientMac = '80:d6:05:02:1d:b9')as t
    );

Answer 5

这里id字段是表的主键。

delete 
from device 
where id in (select * 
             from (select id 
                   from device 
                   where FIND_IN_SET(clientMac,'80:d6:05:02:1d:b9')) 
             as t1 )

从MYSQL子查询中删除

5 个答案: