排名函数 (Transact-SQL)
适用于: SQL Server Azure SQL 数据库 Azure SQL 托管实例 Azure Synapse Analytics 分析平台系统 (PDW) Microsoft Fabric 中的 SQL 分析端点 Microsoft Fabric 中的仓库
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 AdventureWorks2022;
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 AS s
INNER JOIN Person.Person AS p
ON s.BusinessEntityID = p.BusinessEntityID
INNER JOIN Person.Address AS a
ON a.AddressID = p.BusinessEntityID
WHERE TerritoryID IS NOT NULL AND SalesYTD <> 0;
结果集如下。
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 |
José | 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 |