users can only edit their submissions to database

Hey guys i made a form and connected it to database, now i want every user to be able to edit their own submissions. and only put one set /line of information. how can i achieve that?

i put a button it loas the next item on the data set which should be not be editable by other people but who put it in the first place.
Thanks!

The following articles will give you a good start:

YIsrael