MySQL删除重复行
我有一个评论表,其结构如下:MySQL删除重复行,mysql,sql,Mysql,Sql,我有一个评论表,其结构如下: id, name, email, comment 我有许多重复的评论,有相同的名字和电子邮件。我需要删除它们,有人能建议我如何使用单个查询实现这一点吗 谢谢可能的副本 DELETE FROM comments c1 WHERE EXISTS ( SELECT * FROM comments c2 WHERE c2.id <> c1.id AND c2.name = c1.name AN
id, name, email, comment
我有许多重复的评论,有相同的名字和电子邮件。我需要删除它们,有人能建议我如何使用单个查询实现这一点吗
谢谢可能的副本
DELETE FROM comments c1
WHERE EXISTS (
SELECT *
FROM comments c2
WHERE c2.id <> c1.id
AND c2.name = c1.name
AND c2.email = c1.email
AND c2.comment = c1.comment
)
AND c1.id <> (
SELECT MIN(c2.id)
FROM comments c2
WHERE c2.name = c1.name
AND c2.email = c1.email
AND c2.comment = c1.comment
)