Hi ! I´m doing my first publishing system for a last aquired boooks for a library. the problem begin in the id field, wich i choose to be primary key and unique. i could just insert data one time the others give me this error: Cannot insert a duplicate key into unique index biblioteca_pkey i use this piece of code below to insert the data: $query = "INSERT INTO biblioteca (id, autor, titulo, editora) values ('$id', '$autor', '$titulo', '$editora')"; $result = pg_exec($db, $query); may i can alter the id collumn and the query to insert the data anybody knows what exactly to do ? Thank´s Ângelo ________________________________________ A busca mais veloz e precisa da internet. Acesse agora: http://www.zoom.com.br.