wordpress如何一次性去除标题重复文章

有些站长朋友使用wordpress做采集站，不断的云采集各类文章自动发布到自己的网站上。但采集站最大的问题就是会采集到很多重复文章。这时，我们需将采集过来的重复文章进行去重处理。（相关教程：wordpress如何实现自动采集）

以下是二种去除标题重复文章的方法：

第一种：插件法。

通过在后台安装去复重文章插件Delete Duplicate Posts，可以去除标题重复的文章，只保留一篇不重复的。

第二种方法：通过SQL代码的方法

1. 去除重复文章，只保留一篇

   CREATE TABLE my_tmp AS SELECT MIN(ID) AS col1 FROM wp_posts GROUP BY post_title;
   
   DELETE FROM wp_posts WHERE ID NOT IN (SELECT col1 FROM my_tmp);
   
   DROP TABLE my_tmp;
   

2. 去除重复文章，一片都不保留

   CREATE TABLE my_tmp AS Select ID AS col1 From wp_posts Where post_title In (Select post_title From wp_posts Group By post_title Having Count(*)>2);
   
   DELETE FROM wp_posts WHERE ID IN (SELECT col1 FROM my_tmp); 
   
   DROP TABLE my_tmp;
   

3. 另一种去除所有重复文章的方法

   CREATE TABLE my_tmp AS Select ID AS col1 From wp_posts Where post_title In (Select post_title From wp_posts Group By post_title Having Count(*)>2);DELETE FROM wp_posts WHERE ID IN (SELECT col1 FROM my_tmp); DROP TABLE my_tmp;
   

操作方法很简单，只需将上面的SQL语句，放到自己网站数据库的 SQL框里，然后执行就可以了。（注意：操作之前，请先进行网站备份）