有些站長朋友使用wordpress做采集站，不斷的云采集各類文章自動發(fā)布到自己的網(wǎng)站上。但采集站最大的問題就是會采集到很多重復(fù)文章。這時，我們需將采集過來的重復(fù)文章進行去重處理。

以下是二種一次性去除標(biāo)題重復(fù)文章的方法：

1. 去除重復(fù)文章，只保留一篇 (只測試了這一種方法，確實有效，刪除前一定要備份數(shù)據(jù)) 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. 去除重復(fù)文章，一篇都不保留 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. 另一種去除所有重復(fù)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;

操作方法很簡單，只需將上面的SQL語句，放到自己網(wǎng)站數(shù)據(jù)庫的 SQL框里，然后執(zhí)行就可以了。（注意：操作之前，請先進行網(wǎng)站備份）

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