note Corion <p>From your other questions, it seems to me as if you are confusing the [doc://keys] of a hash, and the (primary) keys in a database. These two are different concepts.</p> <p>If you are starting out with Perl, [doc://perlintro] maybe is a good start. Also, consider the [doc://each] keyword.</p> <p>But thinking more about your questions, I think that you don't want a hash at all, you want to fetch (by using <c>->selectall_arrayref</c>) a list of rows. These rows can be hashes again, with one key per column.</p> 992589 992589