摘要: IFNULL(exp1, exp2) 如果存在exp1则展示exp1,如果没有输出exp2 cast convert # Write your MySQL query statement belowselect DISTINCT Num as ConsecutiveNumsfrom ( select 阅读全文
posted @ 2019-03-21 19:53 AHappyBird_Grace 阅读(1058) 评论(0) 推荐(0) 编辑