Sql server SQL Server条件序列号

我有一个表中的客户列表，我想给每个客户分配一个序列号，并将其保存到另一个表中。 但是，序列应该每月重新启动

目前，我有以下问题：

INSERT INTO tblSerialNo
SELECT CustomerNo
      ,FORMAT(getdate(), 'yyyyMM')
      ,ROW_NUMBER() OVER (ORDER BY CustomerNo ASC) AS SerialNo 
FROM tblCustomer

但是SerialNo列上的顺序会继续，即使月份发生了变化

电流输出：

--------------------------
|Customer|Month |SerialNo|
|--------+------+--------|
|17000001|201710|00001   |
|17000002|201710|00002   |
|17000003|201710|00003   |
|17000004|201710|00004   |
|17000005|201710|00005   |
|17000001|201710|00006   |
|17000002|201710|00007   |
|17000003|201710|00008   |
|17000004|201710|00009   |
|17000005|201710|00010   |
|17000001|201711|00011   |
|17000002|201711|00012   |
|17000003|201711|00013   |
|17000004|201711|00014   |
|17000005|201711|00015   |
--------------------------

期望输出：

--------------------------
|Customer|Month |SerialNo|
|--------+------+--------|
|17000001|201710|00001   |
|17000002|201710|00002   |
|17000003|201710|00003   |
|17000004|201710|00004   |
|17000005|201710|00005   |
|17000001|201710|00006   |
|17000002|201710|00007   |
|17000003|201710|00008   |
|17000004|201710|00009   |
|17000005|201710|00010   |
|17000001|201711|00001   |
|17000002|201711|00002   |
|17000003|201711|00003   |
|17000004|201711|00004   |
|17000005|201711|00005   |
--------------------------

---

请帮忙。提前感谢。

在您的

订购依据

条款之前添加

分区依据

：

INSERT INTO tblSerialNo
SELECT CustomerNo
      ,FORMAT(getdate(), 'yyyyMM')
      ,ROW_NUMBER() OVER (PARTITION BY FORMAT(getdate(), 'yyyyMM') ORDER BY CustomerNo ASC) AS SerialNo 
FROM tblCustomer

---

你可以这样做

INSERT INTO tblSerialNo
select customerno,[Month],
ROW_NUMBER() OVER (partition by [Month] ORDER BY CustomerNo ASC) AS SerialNo  from 
(
SELECT CustomerNo ,FORMAT(getdate(), 'yyyyMM')as [Month] FROM tblCustomer
)as a

---

INSERT-to-tblSerialNo

应该做什么？你能解释一下

INSERT

和

select

是如何协同工作的吗？

INSERT INTO tblSerialNo
select customerno,[Month],
ROW_NUMBER() OVER (partition by [Month] ORDER BY CustomerNo ASC) AS SerialNo  from 
(
SELECT CustomerNo ,FORMAT(getdate(), 'yyyyMM')as [Month] FROM tblCustomer
)as a