摘要: 数据表的内容: selectnumber,sum( if( score >= 60, score, 0)) as total_score,sum( if( score < 60, 1, 0 )) as sum_notpassfrom students.score group by number 统计 阅读全文
posted @ 2019-08-09 16:45 期待明天** 阅读(12281) 评论(0) 推荐(0) 编辑