2015年6月15日
MySQL: Lasy UNION
摘要： Method 1:From book select greatest(@found := -1, user_id) as user_id, 'user' as which_tbl from user where user_id = 1union allselect user_id as user... 阅读全文
posted @ 2015-06-15 16:07 rongbin 阅读(148) 评论(0) 推荐(0)