MySQL 从中删除

Question

我正在尝试从 table 中删除某种重复项，可以通过此查询选择：

SELECT * 
  FROM `articles` AS t1 
 WHERE EXISTS (
                SELECT `id` 
                  FROM articles AS t2 
                 WHERE t2.link = t1.link AND 
                       t2.id > t1.id
               );

所以我尝试了这两个查询，但它们似乎也不起作用：

DELETE FROM `articles` AS t1 
WHERE EXISTS (
              SELECT `id` FROM articles AS t2 
               WHERE t2.link = t1.link AND 
                     t2.id > t1.id
              );

&

DELETE FROM t1 USING `articles` AS t1 
WHERE EXISTS (
              SELECT `id` 
                FROM `articles` AS t2 
               WHERE t2.link = t1.link AND 
                     t2.id > t1.id
              );

两个return语法错误。

Answer 1

您可以在 from 子句中使用多个表：

DELETE t1
FROM   `articles` t1 , `articles` t2
WHERE  t2.link = t1.link AND t2.id > t1.id

Answer 2

delete
from articles using articles,
    articles a1
where articles.id > a1.id
    and articles.link = a1.link

MySQL 从中删除

MySQL DELETE FROM AS

mysql

sql

duplicate-removal

sql-delete