MySQL 多行更新查询

Question

我需要更新我的数据库，它是基于 locationId 的多行软删除

update device d
set d.deleteDate='2016-05-07'
where d.id in (select dtg.deviceId from devicestogroups dtg
               where dtg.groupId in (select g.id from `group` g
                                     where g.locationId ='1'));

当我运行查询时出现错误:

Error Code: 1175. You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL Editor and reconnect.

据我所知，子查询将返回 2 条记录，因为子查询返回两条记录更新不会发生，但我该如何解决这个问题。我试图解决但没有成功。

Answer 1

试试这个，使用 join 而不是带 IN 的子查询会更好:

UPDATE device d
INNER JOIN devicestogroups dtg ON dtg.deviceId = d.id
INNER JOIN `group` g ON g.id = dtg.groupId
    AND g.locationId ='1'
SET d.deleteDate='2016-05-07'

或

UPDATE device d
INNER JOIN devicestogroups dtg ON dtg.deviceId = d.id
INNER JOIN `group` g ON g.id = dtg.groupId
SET d.deleteDate='2016-05-07'
WHERE g.locationId ='1'