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    my $sth = $dbh->prepare($query2);
$sth->execute();
my $employees_loh = $sth->fetchall_arrayref({});
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    $sth->execute($year, $month);
my @array = ();
$sth->bind_col(\(@array));
$sth->fetchall_arrayref({});
  3. or download this
    DBI bind_col: invalid number of arguments: got handle + 0, expected ha
+ndle + between 2 and 3
Usage: $h->bind_col($column, \$var [, \%attr]) at etc...