Multiple notification about the same event

Hello,

after some struggle, I created my first trivial notification applicaiton.
One problem I don't quite understand. Let's say, I want to generate
notification whenever in the table1 there's new record with col1='x'. Will
NS ensure that each such record generates only one notification, or it's
something I have to do? if the latter, how?

So far, I based my trivial application on SELECT ID FROM TABLE1 WHERE
COL1='X' ; and NS generates the same notifications about each such row in
every cycle, over and over again.


regards