why the output not shown

Attaching the source script here

DECLARE @device_id varchar(6);
DECLARE @counter decimal(10,0);
DECLARE @device_count INT;
DECLARE @lgroup_id varchar(20);

SET @counter = 1;
SET @device_count = 2;
SET @lgroup_id=6;

DECLARE devices_my CURSOR LOCAL for
  select device_id from devices where DEVICE_PIN between  5009166661 and 5009166662 order by device_id;

open devices_my;

SET IDENTITY_INSERT SCHED_ITEMS ON


while @COUNTER <= @device_count    
begin
    FETCH NEXT FROM devices_my INTO @device_id;
    IF @@FETCH_STATUS = 0

    PRINT 'Device ID: ' + @device_id + '    Counter: ' + convert(varchar(10),@counter)
   
    SET @COUNTER = @COUNTER + 1
end
CLOSE devices_my;
DEALLOCATE devices_my;

SET IDENTITY_INSERT SCHED_ITEMS OFF;

Is this the full code attached?Whats the output your'e getting.Did you say you just getting '*'
as output?

yes, this is the full code, the output I got is

*
*

Do you mean I should put this way instead?


FETCH NEXT FROM devices_my INTO @device_id;

while @COUNTER <= @device_count    
begin
   
    IF @@FETCH_STATUS = 0

    PRINT 'Device ID: ' + @device_id + '    Counter: ' + convert(varchar(10),@counter)
          

    SET @COUNTER = @COUNTER + 1
end

Is there any reason you are writing the CURSOR that way and why are you doing the following?
SET IDENTITY_INSERT SCHED_ITEMS ON
,,,
SET IDENTITY_INSERT SCHED_ITEMS OFF;

Yes please .See below.
Also check to see if @device_id has NULL VALUE or any special character in it.

FETCH NEXT FROM devices_my INTO @device_id;

while @COUNTER <= @device_count    
begin
   
    IF @@FETCH_STATUS = 0

    PRINT 'Device ID: ' + @device_id + '    Counter: ' + convert(varchar(10),@counter)
         
   SET @COUNTER = @COUNTER + 1
 FETCH NEXT FROM devices_my INTO @device_id;

end

print is just test statement. I have "Insert into..." statement instead.

Change your statement like this....

DECLARE devices_my CURSOR LOCAL for
  select cast(device_id  as varchar(200))  from devices where DEVICE_PIN between  5009166661 and 5009166662 order by device_id;


I think there is some issue with implicit conversion...