wordpress 2.6 引入了文章修订历史功能，当时我们翻译成“编辑历史”，但这一功能对多数个人博客毫无用处，还往数据库中写入了一些毫无用武之地的内容，假若你是个有洁癖的人，那么我们一起来看这个教程，来个大扫除吧：
('WP_POST_REVISIONS', );
DELETE FROM wp_postMeta WHERE post_id IN (SELECT id FROM wp_posts WHERE post_type = 'revision');DELETE FROM wp_term_relationships WHERE object_id IN (SELECT id FROM wp_posts WHERE post_type='revision');DELETE FROM wp_posts WHERE post_type='revision';