insert into contis(nom, lecture_seule) values('foo', 't');
insert into contis(nom) values('bar');
insert into contis(nom) values('baz');
insert into contis(nom) values('schmilblick');
       
insert into droits(moderateur, conti, ecrire)
        values( 'zoghaib', 'foo', 'f' );

insert into droits(moderateur, conti)
        values( 'ramanana', 'bar' ); 