Luis Castillo <luiscastillor@xxxxxxxxx> writes: > I would like to know how can I control in my database the rows that a > user has inserted. I mean many users can insert information in a table > but when trying to update the information I want that a user can change > only those rows inserted by him. Is this possible with Postgresql? Sure, if you add a column that records which user inserted the row, and then make a BEFORE UPDATE trigger that throws an error if it doesn't match. regards, tom lane