Question

I’m using the following procedure in one of my projects.

create procedure [dbo].[SMSStudentSelect2]
@Sorp char(20)
as
begin
   select @Sorp PhoneNo from Students 
   where DATALENGTH(@Sorp) = 11 and ClassId = 1 
   and GRNo not in(select GRNo from Discharge)
end

my problem is: when I put SPhoneNo in the parameter @Sorp I get no result while when i directly use SPhoneNo i.e I use the query like

select SPhoneNo from Students where DATALENGTH(SPhoneNo) = ......... 

in my procedure, I Get the disired result

Can anyone please solve my problem????

Answer 1

EDIT based on comments to determine what the OP wants:

try something like this:

create procedure [dbo].[SMSStudentSelect2]
@Sorp char(1) --"S" returns the SPhoneNo, "P" returns the PPhoneNo
as
begin
   select
       CASE
           WHEN @Sorp='S' THEN SPhoneNo 
           ELSE PPhoneNo 
       END AS PhoneNo
       from Students 
       where DATALENGTH(@Sorp) = 11 and ClassId = 1 
           and GRNo not in(select GRNo from Discharge)
end

pass in a “S” or a “P” to get the column you want.