sqlserver2005前: --分组取最大最小常用sql--测试环境if OBJECT_ID('tb') is not null drop table tb;gocreate table tb( col1 int, col2 int, Fcount int)insert into tbselect 11,20,1 union allselect 11,22,1 union allselect 11,23,2 union allselect 11,24,5 union allselect 12…

oracle  分组取第一行数据 SELECT * FROM ( SELECT ROW_NUMBER() OVER(PARTITION BY x ORDER BY y DESC) rn, t.* FROM test1 t ) WHERE rn = 1; 查找oracle  执行的语句 select t.*from v$sqlarea t where t.FIRST_LOAD_TIME like '2018-11-05%' order by t.FIRST_LOAD_TIME desc…

oracle分组后取每组第一条数据   '数据格式     分组取第一条的效果   [sql] SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY x ORDER BY y DESC) rn, test1.* FROM test1) WHERE rn = 1 ;…

看看曾经的私密日志.原来自己之前被非常多小而简单的问题困惑过. 看着那时候我们还是新手中的新手做的备忘笔记! 事实上就是用了Oracle的统计函数而已! 曾经的日记(看样子应该是曾经公司的源代码,呵呵--)例如以下:勿喷! 对多数据进行分组排序后取每组第一条记录: SELECT * FROM ( SELECT ROW_NUMBER() OVER( PARTITION BY ZA40011_3.URIAGE_DENPYO_NO,ZA40011_3.URIAGE_DENPYO_ROW_NO ORDE…

数据库原始数据如下:数据库名:tbl_clothers 需求是:按照type分组,并获取个分组中price中的最大值,解决sql如下: 方法一: select * from (select type, name, price from tbl_clothers order by price desc) as a   group by a.type; 方法二: select a.* from tbl_clothers as a where price = (select max(price) fr…

  要求:获得按table1_id分组,并且age最大的记录信息,即2.3.5条     方法一: select * from (select * from table2 order by age desc) as a group by a.table1_id   方法二: select a.* from table2 as a where age = (select max(age) from table2 where a.table1_id=table1_id)   方法三: select…

SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY x ORDER BY y DESC) rn,test1.* FROM test1) WHERE rn = 1 ;…

SELECT SysUserID, UserID, ROW_NUMBER() OVER(PARTITION BY UserID ORDER BY AddTime DESC) AS nums AND SysUserID IN (SELECT userid FROM jdrcadmin.admin WHERE deptId ,,,,) ) 查询结果如下图:…

数据格式: 分组取第一条的效果: sql语句: SELECT * FROM ( ;…

‘数据格式 分组取第一条的效果 sql SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY x ORDER BY y DESC) rn, test1.* FROM test1) WHERE rn = 1 ;…