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我有 3 个表（provider、provider_has_product、product）： 在此处输入图像描述

（原文：http ://content.screencast.com/users/Maksold/folders/Jing/media/4e6de435-eeac-4602-95e0-2a1b0b4876ad/2012-01-18_0851.png ）

我尝试通过此代码进行除法运算：

SELECT DISTINCT `provider_has_product`.`provider_id` FROM `provider_has_product` WHERE NOT EXIST
 (SELECT * FROM `product` WHERE NOT EXIST
  (SELECT * FROM `provider_has_product` A1 WHERE 
     A1.`provider_id` = `provider_has_product`.`provider_id` AND
     A1.`product_id` = `product`.`id`))

但它不起作用。它显示：第 2 行的Error Code: 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 'SELECT * FROM产品WHERE NOT EXIST (SELECT * FROMprovider_has_p'

如何在 MySQL 上进行除法并纠正此错误。

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1 回答 1

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检查错字。我很确定它是EXISTS，不是EXIST

于 2012-01-18T07:04:37.660 回答