On Wed, Jun 18, 2008 at 11:04 AM, Dave Coventry <dgcoventry@xxxxxxxxx> wrote: [...] > The marks (or grades) of the students are a different matter and we > want to restrict changes to this data to a very few people. > How about setting up separate database users/groups (aka roles in newer postgresql versions), and only granting update permissions to the users/groups who should have it? David.