my $img = $query->upload('pc_img');	$img = <$img>;
my $id = $query->param('pc_id');

my $sql = "INSERT INTO data_table (id, image) VALUES (?, ?);			## id is BIGINT type, image is LONGBLOB type
my $sth = $dbh->prepare($sql) or die "Couldn't prepare: $DBI::errstr\n";
	$sth->execute($id, $img) or die "Unable to execute query: $DBI::errstr\n";
	$sth->finish;
	$dbh->disconnect;