MySQL在IN条件下使用UNION子查询删除
作者:互联网
我遇到了一个奇怪的SQL错误.最后一个查询不起作用.当然,我可以将DELETE分为三个查询,但是我真的很奇怪,为什么MySQL不允许我这样做.
一个小例子:
(SELECT id FROM stairs WHERE building = 123)
UNION
(SELECT id FROM lift WHERE building = 123)
UNION
(SELECT id FROM qrcodeid WHERE building = 123)
作品!
DELETE FROM startpoint WHERE id IN (SELECT id FROM stairs WHERE building = 123)
也可以!
而
DELETE FROM startpoint WHERE id IN (
(SELECT id FROM stairs WHERE building = 123)
UNION
(SELECT id FROM lift WHERE building = 123)
UNION
(SELECT id FROM qrcodeid WHERE building = 123)
)
引发错误
#1064 – You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘UNION (SELECT id FROM lift WHERE building = 123) UNION (SELECT id FROM qrc’ at line 3
任何线索?
解决方法:
试试那个SQL
DELETE FROM startpoint WHERE id IN (
SELECT id FROM stairs WHERE building = 123
UNION
SELECT id FROM lift WHERE building = 123
UNION
SELECT id FROM qrcodeid WHERE building = 123)
标签:mysql,sql-delete,subquery,union,in-subquery 来源: https://codeday.me/bug/20191011/1894427.html