Easy way to create crosstab query (monthly based aggregate) in Oracle, without using function or procedure (which is faster)

crosstab-query-oracle-month.sql

SELECT
  field_1,
	id_master,
	sum(decode(bln,'01',jumlah)) jan,
	sum(decode(bln,'02',jumlah)) feb,
	sum(decode(bln,'03',jumlah)) mar,
	sum(decode(bln,'04',jumlah)) apr,
	sum(decode(bln,'05',jumlah)) mei,
	sum(decode(bln,'06',jumlah)) jun,
	sum(decode(bln,'07',jumlah)) jul,
	sum(decode(bln,'08',jumlah)) ags,
	sum(decode(bln,'09',jumlah)) sep,
	sum(decode(bln,'10',jumlah)) okt,
	sum(decode(bln,'11',jumlah)) nov,
	sum(decode(bln,'12',jumlah)) des
FROM (
	SELECT 
		m.field_1, 
		d.id_master,
		TO_CHAR(d.field_date,'MM') bln,
		SUM(d.jumlah) jumlah
	FROM 
		detail d, master m
	WHERE 
		d.id_master = m.id_master
	GROUP BY 
		m.field_1,d.id_master,TO_CHAR(d.field_date,'MM')
	) ab
GROUP BY 
	field_1,id_master