MySQL不能指定目标表更新在FROM子句

Question

我要检查一些不需要的记录，并删除它，下面的查询

delete from contain_tab 
where org_id = "RTY" 
     AND id_contain 
      NOT IN (
       select id_contain from(
        SELECT id_contain FROM contain_tab c 
        WHERE org_id = "RTY" 
        AND (c.cu_date,c.cv_date) 
        in(
         select max(cu_date),max(cv_date) from contain_tab cs 
         where org_id = "RTY" 
         AND cs.container = c.container 
         and cs.mfest_id = c.mfest_id 
         and cs.sl_number = c.sl_number) 
        ) 
       as id_contain) 

结构

CREATE TABLE `contain_tab` (
`id_contain` int(11) NOT NULL, 
`org_id` varchar(5) NOT NULL, 
`container` varchar(24) DEFAULT NULL, 
`eta_dest` date DEFAULT NULL, 
`mfest_id` varchar(30) DEFAULT NULL, 
`sl_number` varchar(30) DEFAULT NULL, 
`orig_id` varchar(8) DEFAULT NULL, 
`cu_date` date DEFAULT NULL, 
`cv_date` date DEFAULT NULL, 
`vehicle` varchar(32) DEFAULT NULL, 
`user_defined_field1` varchar(35) DEFAULT NULL, 
`user_defined_field2` varchar(35) DEFAULT NULL 
`created_date` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP) ENGINE=InnoDB DEFAULT CHARSET=utf8; 

我的错误，我已经使用 MySQL说：文档

1093 - 你不能指定目标表'包含'在FROM子句中更新

请帮我修正这个错误

Answer 1

您的tablename contain给反引号，因为它是一个关键字

`contain` 

Answer 2

使用反引号作为你的名字包括保留关键字尝试。我冒着格式化您的查询的自由。

看看MySQL reserved keywords，并尽量避免它们在您的数据库/表/列的名称。

delete from `contain_tab` 
where `org_id` = "RTY" 
     AND `id_contain` 
      NOT IN (
      select `id_contain` 
      from(
        SELECT `id_contain` 
        FROM `contain_tab` c 
        WHERE `org_id` = "RTY" 
         AND (c.`cu_date`, c.`cv_date`) 
          in (
           select max(`cu_date`), max(`cv_date`) 
           from `contain_tab` cs 
           where `org_id` = "RTY" 
            AND cs.`container` = c.`container` 
            and cs.`mfest_id` = c.`mfest_id` 
            and cs.`sl_number` = c.`sl_number` 
          ) 
       ) as "id_contain" 
     );