排名函数 (Transact-SQL)
排名函数为分区中的每一行返回一个排名值。根据所用函数的不同，某些行可能与其他行接收到相同的值。排名函数具有不确定性。
Transact-SQL 提供下列排名函数：
示例
以下示例显示了用在同一查询中的四个排名函数。有关函数特定的示例，请参阅每个排名函数。
USE AdventureWorks2008R2;
GO
SELECT p.FirstName, p.LastName
,ROW_NUMBER() OVER (ORDER BY a.PostalCode) AS 'Row Number'
,RANK() OVER (ORDER BY a.PostalCode) AS 'Rank'
,DENSE_RANK() OVER (ORDER BY a.PostalCode) AS 'Dense Rank'
,NTILE(4) OVER (ORDER BY a.PostalCode) AS 'Quartile'
,s.SalesYTD, a.PostalCode
FROM Sales.SalesPerson s
INNER JOIN Person.Person p
ON s.BusinessEntityID = p.BusinessEntityID
INNER JOIN Person.Address a
ON a.AddressID = p.BusinessEntityID
WHERE TerritoryID IS NOT NULL
AND SalesYTD <> 0;
下面是结果集：
FirstName |
LastName |
Row Number |
Rank |
Dense Rank |
Quartile |
SalesYTD |
PostalCode |
|---|---|---|---|---|---|---|---|
Michael |
Blythe |
1 |
1 |
1 |
1 |
4557045.0459 |
98027 |
Linda |
Mitchell |
2 |
1 |
1 |
1 |
5200475.2313 |
98027 |
Jillian |
Carson |
3 |
1 |
1 |
1 |
3857163.6332 |
98027 |
Garrett |
Vargas |
4 |
1 |
1 |
1 |
1764938.9859 |
98027 |
Tsvi |
Reiter |
5 |
1 |
1 |
2 |
2811012.7151 |
98027 |
Shu |
Ito |
6 |
6 |
2 |
2 |
3018725.4858 |
98055 |
Jos |
Saraiva |
7 |
6 |
2 |
2 |
3189356.2465 |
98055 |
David |
Campbell |
8 |
6 |
2 |
3 |
3587378.4257 |
98055 |
Tete |
Mensa-Annan |
9 |
6 |
2 |
3 |
1931620.1835 |
98055 |
Lynn |
Tsoflias |
10 |
6 |
2 |
3 |
1758385.926 |
98055 |
Rachel |
Valdez |
11 |
6 |
2 |
4 |
2241204.0424 |
98055 |
Jae |
Pak |
12 |
6 |
2 |
4 |
5015682.3752 |
98055 |
Ranjit |
Varkey Chudukatil |
13 |
6 |
2 |
4 |
3827950.238 |
98055 |