我想按性别统计城市,如下所示;
City GenderFCount GenderMCount
Redmond 10 20
这是我的查询,在 AdventureWorks 数据库中获取城市和性别
select Gender,City from HumanResources.Employee as t1
inner join HumanResources.EmployeeAddress as t2
on t1.EmployeeID = t2.EmployeeID
inner join Person.Address as t3
on t2.AddressID = t3.AddressID
如果可能的话,您能否以多种方式展示解决方案,例如“PIVOT”、通过sql函数(UDF)、存储过程或其他方式。
谢谢
最佳答案
这是 PIVOT 查询,您可以将其转储到存储过程或 udf
select City, F as GenderFCount, M as GenderMCount
from(
select Gender,City
from HumanResources.Employee as t1
inner join HumanResources.EmployeeAddress as t2
on t1.EmployeeID = t2.EmployeeID
inner join Person.Address as t3
on t2.AddressID = t3.AddressID
) AS pivTemp
PIVOT
( count(Gender)
FOR Gender IN ([F],[M])
) AS pivTable
UDF 示例
CREATE FUNCTION fnPivot()
RETURNS TABLE
AS
RETURN (
select City, F as GenderFCount, M as GenderMCount
from(
select Gender,City
from HumanResources.Employee as t1
inner join HumanResources.EmployeeAddress as t2
on t1.EmployeeID = t2.EmployeeID
inner join Person.Address as t3
on t2.AddressID = t3.AddressID
) AS pivTemp
PIVOT
( count(Gender)
FOR Gender IN ([F],[M])
) AS pivTable
)
GO
现在你可以这样调用它
SELECT * FROM dbo.fnPivot()
关于SQL AdventureWorks 按城市按性别统计员工数量,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3541016/