SQL-行转列（PIVOT）实例1

--未旋转之前的查询结果
select s.Name ShiftName,h.BusinessEntityID,d.Name as DpartmentName
from  HumanResources.EmployeeDepartmentHistory h
inner join HumanResources.Department d
on h.DepartmentID=d.DepartmentIDinner join HumanResources.Shift s
on s.ShiftID=h.ShiftIDWHERE  ENDDATE IS NULL ANDd.Name IN('Production','Engineering','Marketing')order by ShiftName

--旋转之后的结果select ShiftName,Production,Engineering,Marketing
from 
(select s.Name ShiftName,h.BusinessEntityID,d.Name as DpartmentName
from  HumanResources.EmployeeDepartmentHistory h
inner join HumanResources.Department d
on h.DepartmentID=d.DepartmentIDinner join HumanResources.Shift s
on s.ShiftID=h.ShiftIDWHERE  ENDDATE IS NULL ANDd.Name IN('Production','Engineering','Marketing'))t
pivot 
(count(BusinessEntityID)for DpartmentName in ([Production],[Engineering],[Marketing]))border by ShiftName