只有3个设置：

1、起始时间自己更改一下。'2014-1-01'

2、然后就是控制随机生成在那个日期段。500

3、文章的起始ID和结束ID。6297 AND 14332

UPDATE wp_posts SET post_date = DATE_ADD('2014-1-01', INTERVAL ROUND(RAND() * 500 + 1) DAY) WHERE ID between 6297 AND 14332;

update wp_posts set post_modified = post_date WHERE ID between 6297 AND 14332;

update wp_posts set post_date_gmt = post_date WHERE ID between 6297 AND 14332;

update wp_posts set post_modified_gmt = post_modified WHERE ID between 6297 AND 14332;

update wp_posts set post_status = 'publish' WHERE ID between 6297 AND 14332;

然后再数据库里执行就可以了。