sql server 2005中row_number怎么用

发布网友发布时间：2022-04-09 00:36

共6个回答

懂视网时间：2022-04-09 04:57

tabs as ( select ROW_NUMBER() over(partition by customerID order by totalPrice) as rows,customerID,totalPrice, DID from OP_Order ) select MAX(rows) as ‘下单次数‘,customerID from tabs group by customerID with tabs as ( select ROW_NUMBER() over(partition by customerID order by insDT) as rows,customerID,totalPrice, DID from OP_Order ) select * from tabs where totalPrice in ( select MIN(totalPrice)from tabs group by customerID ) 注意：在使用over等开窗函数时，over里头的分组及排序的执行晚于“where，group by，order by”的执行 select ROW_NUMBER() over(partition by customerID order by insDT) as rows, customerID,totalPrice, DID from OP_Order where insDT>‘2011-07-22‘

SQL的ROW_NUMBER函数

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热心网友时间：2022-04-09 02:05

row_number是2005新增的排名函数，顾名思义，就是可以生成类似名次一样的序列号
select ROW_NUMBER() OVER([PARTITION BY COLUMN] ORDER BY COLUMN) as rn

热心网友时间：2022-04-09 03:23

select *
from (select * ,row_number()over(order by ID) as Row from tab)as a
where row<=5
用法 row_number()over(order by ID) --order by 排序列

热心网友时间：2022-04-09 04:58

ROW_NUMBER() OVER(PARTITION BY COLUMN ORDER BY COLUMN)

热心网友时间：2022-04-09 06:49

SELECT *, Row_Number() OVER (partition by deptid ORDER BY salary desc) rank FROM employee

热心网友时间：2022-04-09 08:57

基本语法：ROW_NUMBER() OVER(PARTITION BY COLUMN ORDER BY COLUMN)
简单的说row_number()从1开始，为每一条分组记录返回一个数字。可按下面方式使用

ROW_NUMBER() OVER (ORDER BY colName DESC) 是先把colName列降序，再为降序以后的每条记录返回一个序号。
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)
示例如下:
需求：根据部门分组，显示每个部门的工资等级
SELECT *, Row_Number() OVER (partition by deptid ORDER BY salary desc) rank FROM employee