Question

我尝试从表中删除重复记录

我的SQL查询是：

 DELETE FROM products_description AS t1 WHERE EXISTS (
SELECT 'products_id', 'site_language_id'
FROM products_description AS t2
WHERE t2.products_id = t1.products_id
AND t2.site_language_id = t1.site_language_id
);

它给出了这个错误：

#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 'as t1
where  exists (select 'products_id','site_language_id' from products_desc' at line 1

我不知道遗失了什么？

Answer 1

MySQL因为存在语法错误而抱怨。尝试用反引号（`）替换引号（＆＃39;）。

虽然小心！然后查询将起作用，但会删除所有行而不只是重复....

Answer 2

删除所有有重复的记录

DELETE FROM products_description
WHERE product_id IN (
                     SELECT product_id FROM( Select product_id,site_language_id
                                             From products_description 
                                             Group By product_id,site_language_id
                                             Having Count(*)>1
                                           ) As X
                    )As Y

删除SQL查询中的重复记录语法错误

2 个答案: