Function to return in case of non matching records

Question

Hi
CREATE TABLE [dbo].[DeptMaster](
[DeptId] [int] NULL,
[DeptName] [nvarchar](50) NULL
) ON [PRIMARY]
Insert into DeptMaster values
(1,'HeadOffice'),
(2,'BranchOffice'),
(3,'')
CREATE FUNCTION [dbo].[GetDepartmentId]
@DepartmentNameIn nvarchar(128)
RETURNS int
AS
BEGIN
DECLARE @DepartmentId INT
SELECT @DepartmentId = [DeptId] from DeptMaster where LTRIM(RTRIM([DeptName])) = @DepartmentNameIn
If @DepartmentId <0
BEGIN
SELECT @DepartmentId = [DeptId] from DeptMaster where LTRIM(RTRIM([DeptName])) = ''
END
RETURN @DepartmentId
END
select dbo.GetDepartmentId ('BranchOffice') -- will return 2, correct
select dbo.GetDepartmentId ('DivisonalOffice') --- expected 3 ... need to alter my Function so that 3 is returned.
select dbo.GetDepartmentId ('SubOffice') --- expected 3 ... need to alter my Function so that 3 is returned.
-- Reason, Whenever i get data which is not passed, i need to return the 3
kindly suggest how to pass into the  If @DepartmentId <0
as  i get 0 records if no data is found matching
ShanmugaRaj

Answer 1

ALTER FUNCTION [dbo].[GetDepartmentId]
@DepartmentNameIn nvarchar(128) 
RETURNS int
AS
BEGIN
DECLARE @DepartmentId INT ,@flag int
SELECT @DepartmentId = [DeptId] from DeptMaster where LTRIM(RTRIM([DeptName])) =  @DepartmentNameIn 
If @@ROWCOUNT != 0
BEGIN
set @flag=1
END
ELSE
BEGIN
set @flag=0
END
if (@flag = 0)
begin
set @DepartmentId=3
end
RETURN @DepartmentId;
END