Can anyone please help me - I am new to Oracle and trying to learn how to create a simple stored procedure.

I wanted to convert the following MS SQL stored procedure to an Oracle stored procedure - see my attempt below:

MS SQL stored procedure:

CREATE PROCEDURE InsertHelpDesk
(
@EmployeeID int,
@Description nvarchar,
)
AS
INSERT INTO HelpDesk (EmployeeID, Description)
VALUES (@EmployeeID, @Description)

---------------------------------------------------------

Oracle Stored procedure attempt:

CREATE PROCEDURE INSERTHELPDESK
(
: EMPLOYEEID NUMBER;
: DESCRIPTION NVARCHAR;
)
AS
BEGIN
INSERT INTO HELPDESK (EMPLOYEEID, DESCRIPTION)
VALUES (: EMPLOYEEID, : DESCRIPTION)
END;

I keep getting compile errors with the Oracle stored procedure. Can anyone tell me what's wrong or an example of how it should be. I am passing parameter values in from an asp.net web application. Any help much appreciated. Daniel