如何删除数据库中重复的 Wordpress 帖子

Question

当我在 wp_posts 表（使用 phpmyadmin）上运行此代码时，它返回一个重复的帖子。

SELECT a.ID, a.post_title, a.post_type, a.post_status
FROM wp_posts AS a
 INNER JOIN (
   SELECT post_title, MIN( id ) AS min_id
   FROM wp_posts
   WHERE post_type = 'post'
   AND post_status = 'publish'
   GROUP BY post_title
   HAVING COUNT( * ) > 1
 ) AS b ON b.post_title = a.post_title
AND b.min_id <> a.id
AND a.post_type = 'post'
AND a.post_status = 'publish'

请注意，这个给定的帖子实际上不是重复的，它只有与另一个相同的标题（鉴于上面的代码查找重复标题的正常行为）。 然而，问题是数据库中实际上有数百个重复的帖子（如果我手动查看，我可以看到它们），那么为什么我不能使用上面的代码找到它们呢？

• 我还可以从 wordpress 管理面板看到那两个重复的帖子......
• 我还尝试使用一些 Wordpress 插件，它们都找到了与上述代码相同的重复帖子，但没有其他任何一个）。

编辑：如果我查看两个随机重复项，一个有：

ID 9462
post date 2017-03-07 13:06:31
post content "foo"
post title "Les pendules à l'heure"
post status "publish"
post type "post"
guid "http://www.exemple.com/?p=9462"

另一个有：

ID 11409
post date 2017-03-07 13:06:31
post content "foo"
post title "Les pendules à l'heure"
post status "publish"
post type "post"
guid "http://www.exemple.com/?p=9462"

谢谢

Answer 1

这是我设法解决我的问题的方法...

我注意到即使重复帖子的标题看起来相同，一个有撇号，而另一个有 &#039 ;

所以首先我运行这个查询来查看有多少帖子标题有撇号：

SELECT post_title FROM wp_posts WHERE post_title LIKE "%'%",

它返回了 1825 个结果。 然后我运行以下命令来查看有多少帖子标题有 &#039 ;

SELECT post_title FROM wp_posts WHERE post_title LIKE "%'%"

它返回了 720 个结果。 所以我想我会替换所有的 &#039 ; 通过撇号，使用以下查询：

UPDATE wp_posts SET post_title = REPLACE (post_title, ''', '\'');

然后，我能够使用：

SELECT a.ID, a.post_title, a.post_type, a.post_status
FROM wp_posts AS a
 INNER JOIN (
   SELECT post_title, MIN( id ) AS min_id
   FROM wp_posts
   WHERE post_type = 'post'
   AND post_status = 'publish'
   GROUP BY post_title
   HAVING COUNT( * ) > 1
 ) AS b ON b.post_title = a.post_title
AND b.min_id <> a.id
AND a.post_type = 'post'
AND a.post_status = 'publish'

其中返回了 572 个帖子，我只是使用以下方法删除了这些帖子：

DELETE a.*
FROM wp_posts AS a
   INNER JOIN (
      SELECT post_title, MIN( id ) AS min_id
      FROM wp_posts
      WHERE post_type = 'post'
      AND post_status = 'publish'
      GROUP BY post_title
      HAVING COUNT( * ) > 1
   ) AS b ON b.post_title = a.post_title
AND b.min_id <> a.id
AND a.post_type = 'post'
AND a.post_status = 'publish'

Answer 2

上述方式可能会很慢。 你可以用BIG BOY的方式来做...

-- 创建临时表 CREATE TABLE posts_temp_table LIKE wp_posts;

-- 添加约束 ALTER TABLE posts_temp_table ADD UNIQUE(YOUR_UNIQUE_FIELD, id);

-- 复制数据 INSERT IGNORE INTO posts_temp_table SELECT * FROM wp_posts;

-- 重命名并删除重命名表 wp_posts 到 old_wp_posts，posts_temp_table 到 wp_posts； 删除表 old_wp_posts;

Answer 3

Try this

DELETE a.*
FROM wp_posts AS a
   INNER JOIN (
      SELECT post_title, MIN( id ) AS min_id
      FROM wp_posts
      WHERE post_type = 'post'
      AND post_status = 'publish'
      GROUP BY post_title
      HAVING COUNT( * ) > 1
   ) AS b ON b.post_title = a.post_title
AND b.min_id <> a.id
AND a.post_type = 'post'
AND a.post_status = 'publish'