Question

我正在升级和优化旧的表结构。为了正确使用replace into，我删除了干扰2列新唯一键的旧僵尸条目。

查询：

 DELETE from `relProductsPrices` where `ID` in 

  (SELECT scanA.ID from `relProductsPrices` as scanA 
             inner join `relProductsPrices` as scanB 

   where scanA.ID        < scanB.ID 
     and scanA.product   = scanB.product
     and scanA.priceName = scanB.priceName);

错误：

#1093 - You can't specify target table 'relProductsPrices' for update in FROM clause

我现在还不确定如何正确地将其合并到一个mySQL查询中？

我希望这个问题没有重复的条目，我似乎无法找到类似的，适应性的条目。有关于此错误的问题，但我在这里根本没有更新查询，大多数人所说的解决方案（创建一个子选择）已经事先由我完成了。

提前致谢！

Answer 1

试试这个：

DELETE FROM `relProductsPrices` 
WHERE `ID` IN ( 
     SELECT 
       tmp.ID 
     FROM (
       SELECT 
         scanA.ID 
       FROM 
         `relProductsPrices` as scanA 
       INNER JOIN `relProductsPrices` as scanB 
         ON scanA.ID        < scanB.ID 
         AND scanA.product   = scanB.product
         AND scanA.priceName = scanB.priceName
     ) as tmp
 );

错误＃1093 - 您无法在FROM子句中为更新指定目标表'relProductsPrices'

1 个答案: