摘要: SELECT CONCAT_WS("_",name,password) as name from `user`; SELECT GROUP_CONCAT(name,":",password) as name from `user` GROUP BY roles; 一、CONCAT()函数CONCAT 阅读全文
posted @ 2017-12-27 19:43 龙昊雪 阅读(337) 评论(0) 推荐(0) 编辑