摘要: create table abc(A int,B int) Select A,count(B) as total from ABC group by A Select A,count(B) as total1 from ABC where B > 30 group by A Select A,cou 阅读全文
posted @ 2019-02-23 22:42 奥雷连诺 阅读(15554) 评论(0) 推荐(0) 编辑