ROW_NUMBER()与PARTITION BY 实例

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ROW_NUMBER()与PARTITION BY 实例

环境:SQL Server 2008 R2 数据表结构 SELECT A.* FROM [tbiz_AssScoreWeidu] A SELECT A.* ,ROW_NUMBER() OVER ( PARTITION BY A.[WeiduNo] ORDER BY A.[ID] ) AS rn FROM [tbiz_AssScoreWeidu] A PARTITION BY 可以跟多个条件参考…

【SQL】ROW_NUMBER() OVER(partition by 分组列 order by 排序列)用法详解+经典实例

#用法说明 select row_number() over(partition by A order by B ) as rowIndex from table A :为分组字段 B:为分组后的排序字段. table 表的结构多为: 多人多条的相关数据.(比如:订单信息) 此条sql语句,多用于对数据进行分组排序,并对每个组中的数据分别进行编号,编号从1开始递增,每个组内的编号不会重复: #经典实例 0.填充数据 create table [OrderInfo]( ,) NOT NULL…

去重 ROW_NUMBER() OVER(PARTITION BY 分组字段 ORDER BY 排序字段) RN

关键字 ROW_NUMBER() OVER(PARTITION BY 分组字段 ORDER BY 排序字段) RN 按照分组字段进行排序并标编号 ROW_NUMBER() OVER(PARTITION BY 分组字段 ORDER BY 排序字段) RN 语法 ROW_NUMBER() OVER(PARTITION BY XMJL_UID ORDER BY XMCREATETIME) RN 实例 SELECT XMJL_UID,XMJL,XMCREATETIME,ROW_NUMBER() OVE…

row_number() OVER (PARTITION BY COL1 ORDER BY COL2)

select *,ROW_NUMBER() over(partition by deviceID order by RecordDate desc row_number() OVER (PARTITION BY COL1 ORDER BY COL2) 表示根据COL1分组,在分组内部根据 COL2排序,而此函数计算的值就表示每组内部排序后的顺序编号(组内连续的唯一的) 实例: 初始化数据 create table employee (empid int ,deptid int ,salary d…

oracle ROW_NUMBER() OVER (PARTITION BY COL1 ORDER BY COL2)

工作中遇到的一个问题,需要对某列进行分组排序,取其中排序的第一条数据项用到了ROW_NUMBER() OVER(PARTITION BY COL1 ORDER BY COL2)来解决此问题. 实例准备: CREATE OR REPLACE TABLE EMPLOYEE ( EMPID INT, DEPTID INT, SALARY ,) ); ,,234.00); ,,1233.00); ,,600.00); ,,4512.00); ,,3424.00); ,,1232.00); ,,4445…

MYSQL-实现分组排序对比 ORACLE 和SQLserver用 row_number() over(partition by ) 分组排序功能

以下是个人笔记: 本文是为了理解 row_number() over(partition by ) 和实现各种数据库的分组排序功能 select ROW_NUMBER()over( partition by officeid order by userid )as id, * from tbl_User sqlserver中表示根据officeid分组然后根据userid排序 select ROW_NUMBER()over( order by officeid )as id, * from…

ROW_NUMBER() OVER(PARTITION BY)

select * from (select *,ROW_NUMBER() OVER(PARTITION BY GoodsID ORDER BY IsMain desc,OrderNum) as MainOrder from GoodsUploadFile) twhere t.MainOrder = 1--and t.GoodsID ='6c008a6e-0194-4159-92cd-e8df9d5feea37e316cd9-6470-4306-94b7-16855dd13b1e' -------…