SQL SELECT语句中嵌入多重选择，用if语句

问题补充说明：我是这样写的，不知道哪里错了USE YGGLGOSELECT EmployeeID,Name,Address,DepartmentID= ( IF (SELECT DepartmentID FROM Employees)='1' BEGIN RETURN '财务部' END IF (SELECT DepartmentID FROM Employees)='2' BEGIN RETURN '人力资源部' END IF (SELECT DepartmentID FROM Employees)='3' BEGIN RETURN '经理办公室' END IF (SELECT DepartmentID FROM Employees)='4' BEGIN RETURN '研发部' END IF (SELECT DepartmentID FROM Employees)='5' BEGIN RETURN '市场部' END )FROM Employees

SELECTEmployeeID,Name,Address,

casewhenDepartmentID='1'then'财务部'

whenDepartmentID='2'then'人力资源部'

whenD进亚文厂epartmentID='3'then'经理办公室'

whenDepartmentID='4't得需图几hen'研发部'

whenDepartmentID='5'then'市场部'ENDasDepartmentID

FROMEmployees

标签：语句,多重选择,SQL