WordPress如何批量删除某个分类下文章？

首先查询一下，其中47为分类ID，看查询结果是否和实际结果符合

1	SELECT * FROM `wp_posts`,`wp_term_relationships` WHERE wp_posts.ID = wp_term_relationships.object_id AND wp_term_relationships.term_taxonomy_id = 47;

然后就可以使用delete语句了，注意，这是sql操作语句，操作前最好备份数据库！

1	DELETE `wp_posts` FROM `wp_posts`, `wp_term_relationships` WHERE wp_posts.ID = wp_term_relationships.object_id AND wp_term_relationships.term_taxonomy_id = 47

再次提醒，执行删除语句前请先备份数据，后果自负！