Oracel查询表中某字段值为去重后第几的记录
发布时间:2020-12-12 16:13:34 所属栏目:百科 来源:网络整理
导读:自己的一点心得,记录一下。 select distinct sal from emp order by sal desc;select sal,rownum rn from (select distinct sal from emp order by sal desc) where rownum 4select sal from (select sal,rownum rn from (select distinct sal from emp ord
自己的一点心得,记录一下。
select distinct sal from emp order by sal desc; select sal,rownum rn from (select distinct sal from emp order by sal desc) where rownum < 4 select sal from (select sal,rownum rn from (select distinct sal from emp order by sal desc) where rownum < 4) where rn > 2 select * from emp where sal = (select sal from (select sal,rownum rn from (select distinct sal from emp order by sal desc) where rownum < 4) where rn > 2) /* 要求:在员工表中查询出工资第三高(去重)的员工信息: 1. 去重查询工资; 2. 从得到的结果中查询出前三条记录; 3. 从到的结果中查询出第三条记录的工资值; 4. 根据3中得到的值,从员工表中查询出员工信息。 */ (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! |