摘要: 1.同一个表下多次查询: sql语句: select b.* ,(select name from exh_common.medicine_type a where b.p_id = a.id) as p_name from exh_common.medicine_type b; 获取表medici 阅读全文
posted @ 2017-04-27 17:28 满月青灰 阅读(490) 评论(0) 推荐(0) 编辑