group by 在sqlserver与oracle中的差别
发布时间:2020-12-12 14:04:09 所属栏目:MsSql教程 来源:网络整理
导读:在sqlServer中group by 不能作为子句查询: 如:select * from (select deptno,count(*) counts from emp group by deptno) 上面在sqlserver中运行会报错,说明sqlserver中group by 不能作为子句 下面sql语句为在oracle查找人数最多的部门以及该部门号: sel
在sqlServer中group by 不能作为子句查询: 如:select * from (select deptno,count(*) counts from emp group by deptno) 上面在sqlserver中运行会报错,说明sqlserver中group by 不能作为子句 下面sql语句为在oracle查找人数最多的部门以及该部门号: select * from (select deptno,count(*) counts from emp group by deptno) where counts = ?(select max(count) from (select deptno,count(*) count from emp group by deptno)); 人数最多的专业在sqlserver中查询: ?select?classID,COUNT(*)?from?student?group?by?classID?having? COUNT(*)=(select?top?1?COUNT(*)?as?人数?from?student?group?by?classID?order?by?COUNT(*)) or COUNT(*)=(select?top?1?COUNT(*)?as?人数?from?student?group?by?classID?order?by?COUNT(*)?desc)?(编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |