Create Table #Test (
ID Int Primary Key Identity,
Category VarChar(100)
)
Insert into #Test
(Category)
Values
('Banana'),
('Banana'),
('Banana'),
('Banana'),
('Banana'),
('Banana'),
('Strawberry'),
('Strawberry'),
('Strawberry'),
('Banana'),
('Banana')
Select
*
,ROW_NUMBER() Over (Partition by Category order by ID) as RowNum
From #Test
Order by ID
所以这个脚本返回这个:
ID Category RowNum
1 Banana 1
2 Banana 2
3 Banana 3
4 Banana 4
5 Banana 5
6 Banana 6
7 Strawberry 1
8 Strawberry 2
9 Strawberry 3
10 Banana 7
11 …