modify Records

I know the sql code to update the records, but I don't know how to return the data in the form. From the report..

I have a report with a link in the id, I want when I click the link it return me the data of this record in the form to be changed. I know the command to change it bu I dont know how to return the data to the form when I click
Nestor

so lets say you have a link like

file.php?id=5

then on the file page you would query the database something like this

mysql_query("SELECT * FROM table WHERE id = '{$_POST['id']}'");