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）
