Working with user-defined Function

Question

I am working on something I am trying to create a user defined function named Employee_Name. Pass an Employee Id as a parameter.

This is what I have so far :

Create function Employee_name (
@EmployeeID int 
 )
 Return Table
 as 
 Return(
         Select * From Employees
    Where Employee_name = @EmplyeeId)
 go
 SELECT * FROM Employee_name

But I am not thinking I am doing this right because where the return table is mark with red. Which means an error. I am still learning this, its kinda confusing for me. I am woundering if the return table should be only a return.

Answer 1

Return Table应为Returns Table

Answer 2

You need to pass an Employee ID to your user defined function

SELECT * FROM Employee_name (1)

Also it should be RETURNS TABLE . So

CREATE FUNCTION Employee_name 
(
    @EmployeeID int 
)
RETURNS TABLE
AS
RETURN
(
    SELECT * FROM Employees
    WHERE Employee_name = @EmployeeID
)
GO

SELECT * FROM Employee_name (1)

You might have some naming collision between the name of your function and the name of the field in the Employees table though (both appear to be called Employee_name )

Answer 3

change it to :

Create function Employee_name (
@EmployeeID int 
 )
 Returns Table
 as 
 Return(
         Select * From Employees
    Where Employee_name = @EmplyeeId)
 go

and in code :

select * from Employee_name (1)