# Loop over a series of keys

foreach $key (@keys) {
    
    # Use the key to do a database lookup

    $sth->execute($key);

    # Get the results of the lookup ie all the entries in
    # the row keyed by the key.

    $columns_ref = $sth->fetchrow_arrayref();

    # Push this reference onto another array to build up
    # an array of the rows corresponding to each key

    push(@entries, $columns_ref);

}


##</code><code>##


foreach $key (@keys) {
    $sth->execute($key);
    $temp_columns_ref = $sth->fetchrow_arrayref();
    @temp_columns = @$temp_columns_ref;
    $columns_ref = \@temp_columns;
    push(@entries, $columns_ref);
}