# Setup code
my $SortField = 'last_name'; # could be 'first_name'
my $Page = '';
my $PageSize = 50;

<<SNIP SNIP SNIP SNIP SNIP>>

# Get the page of data
my $SQL = "SELECT   first_name, last_name "
.         "FROM     Names "
.         "WHERE    $SortField >= '$Page' "
.         "ORDER BY $SortField "
.         "LIMIT    $PageSize ";
my $results = $db->selectall_arrayref($SQL);