Question

I have a table:

ID Code1 Code2 Result
 1  2201  123
 2  1474  173
 3  5478  103
 4  4147  748
 5  4147  123

I want to populate result such that it should first generate <cat> in ID = 3 & 4
then in next update it should generate <dog> in ID = 4 & 5, now since ID 4 has already <cat>, it must keep this message and add new <dog>.
NOTE: i must do that I two(2) update statements.
Expected result:

ID Code1 Code2 Result
 1  2201  123  NULL
 2  1474  173  NULL
 3  5478  103  <cat>
 4  4147  748  <cat> <Dog>
 5  4147  123  <dog>

Here is what I try which is obviously wrong, please help

declare @error1 varchar(100)
set @error1 = '<Cat>'
update #tblA
set error = @error1
from #tblA
where ID in (3,4)

declare @error2 varchar(100)
set @error2 = '<Dog>'
update #tblA
set error = @error1 +'+'+@error2 
from #tblA
where id in (4,5) 

Thanks!

Answer 1

Try this:

UPDATE MyTable
SET [Result]= ISNULL([Result],'') + '<Cat>'
WHERE ID IN (3,4);


UPDATE MyTable
SET [Result]= ISNULL([Result],'') + '<Dog>'
WHERE ID IN (4,5);