网站最近发现好多文章有重复的，手工一个一个很麻烦，就想到了程序。下面就是WordPress删除重复标题文章的几种方法

以下为代码解释：

create table tmp as select min(主键) as col1 from 去重表名 GROUP BY 去重字段;

delete from 去重表名 where 主键 not in (select col1 from tmp);

drop table tmp;

一、通过操作SQL数据库删除：

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;

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;

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)

二、php程序删除

require(‘./wp-load.php’);

$strsql=”create table my_tmp as select min(ID) as col1 from cd_posts group by post_title”;

$strsql1=”delete from cd_posts where ID not in (select col1 from my_tmp)”;

$strsql2=”drop table my_tmp”;

$result=mysql_query($strsql);

$result=mysql_query($strsql1);

$result=mysql_query($strsql2);

保存以上代码以为delete.php，放在根目录，想要删除重复文章的时候，访问这个文件就可以了。

1

个人实测，方法一里面的第1个完美解决问题。

如何sql出现#1050 – Table ‘my_tmp’ already exists    书名他在运行，等他结束。。别急

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