Insert Triggers always run

Who'da thunk it.
I have an insert trigger that does some data validation. no big deal. The validation that it's performing is this:

if not exists (
select 1
from <My other Database>
where column =(select columndata from inserted)
) raiserror (whatever)


looks simple enough, but there are times when I will have an insert statement that isn't inserting any rows. Apparently triggers get fired whether or not there is any data actually being inserted. They get fired anytime there is an insert statement. So, I had to modify the code to have the following

if (exists (select 1 from inserted) begin
if not exists (
select 1
from <My other Database>
where column =(select columndata from inserted)
) raiserror (whatever)
end


Happy SQLing.. (;