mysql - DELETE FROM `table` AS `alias` ... WHERE `alias`.`column` ... 为什么语法错误？

Question

我用 MySQL 试过这个：

DELETE FROM `contact_hostcommands_relation` AS `ContactHostCommand` WHERE (`ContactHostCommand`.`chr_id` = 999999) LIMIT 1

我明白了：

#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 'WHERE (`ContactHostCommand`.`chr_id` = 999999) LIMIT 1' at line 1

注意：此查询是自动生成的，条件基于表别名。

为什么我会收到此错误？

有没有办法在 where 子句中使用表别名？

这是 MySQL 特有的吗？

Answer 1

@Matus 和 @CeesTimmerman 所说的关于 MSSQL 的内容也适用于 MySQL 5.1.73：

delete <alias> from <table> <alias> where <alias>.<field>...

Answer 2

您可以像这样使用 SQL：

DELETE FROM ContactHostCommand 
USING `contact_hostcommands_relation` AS ContactHostCommand 
WHERE (ContactHostCommand.`chr_id` = 999999) 
LIMIT 1

Answer 3

您不能AS在DELETEMySQL 的子句中使用：

DELETE FROM `contact_hostcommands_relation` WHERE (`chr_id` = 999999) LIMIT 1