次序函數 (Transact-SQL)
排名函數會傳回資料分割中每個資料列的次序值。 根據所用的函數而定，有些資料列可能會收到與其他資料列相同的值。 排名函數不具決定性。
Transact-SQL 會提供下列排名函數：
範例
下列範例顯示在相同查詢中使用的四個排名函數。 如需特定函數的範例，請參閱每種排名函數。
USE AdventureWorks2012;
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;
以下為結果集：
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 |
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 |