摘要: 字符函数 (1)CONCAT():字符连接 SELECT CONCAT(‘IMOOC’,’-‘,’MySQL’);//IMOOC-MySQL SELECT CONCAT (first_name,last_name) AS fullname FROM test; (2)CONCAT_WS():使用指定 阅读全文
posted @ 2017-12-26 18:29 QiaoZhi 阅读(1806) 评论(0) 推荐(1) 编辑