oracle 行转列+列转行

oracle实现行列转换的方法总结

　　长->宽，方法一：group by - case when

select
		MDSENO,
		max(case when CUTYPE = 0 then pjMECODE else null end) as cutype0,
		max(case when CUTYPE = 1 then pjMECODE else null end) as cutype1,
		max(case when CUTYPE = 2 then pjMECODE else null end) as cutype2,
		max(case when CUTYPE = 3 then pjMECODE else null end) as cutype3,
		max(case when CUTYPE = 4 then pjMECODE else null end) as cutype4,
		max(case when CUTYPE = 5 then pjMECODE else null end) as cutype5,
		max(case when CUTYPE = 6 then pjMECODE else null end) as cutype6,
		max(case when CUTYPE = 7 then pjMECODE else null end) as cutype7,
		max(case when CUTYPE = 8 then pjMECODE else null end) as cutype8,
		max(case when CUTYPE = 9 then pjMECODE else null end) as cutype9,
		max(case when CUTYPE = 10 then pjMECODE else null end) as cutype10,
		max(case when CUTYPE = 11 then pjMECODE else null end) as cutype11,
		max(case when CUTYPE = 12 then pjMECODE else null end) as cutype12,
		max(case when CUTYPE = 13 then pjMECODE else null end) as cutype13,
		max(case when CUTYPE = 14 then pjMECODE else null end) as cutype14,
		max(case when CUTYPE = 15 then pjMECODE else null end) as cutype15,
		max(case when CUTYPE = 16 then pjMECODE else null end) as cutype16,
		max(case when CUTYPE = 17 then pjMECODE else null end) as cutype17,
		max(case when CUTYPE = 18 then pjMECODE else null end) as cutype18,
		max(case when CUTYPE = 19 then pjMECODE else null end) as cutype19,
		max(case when CUTYPE = 20 then pjMECODE else null end) as cutype20,
		max(case when CUTYPE = 21 then pjMECODE else null end) as cutype21,
		max(case when CUTYPE = 22 then pjMECODE else null end) as cutype22,
		max(case when CUTYPE = 23 then pjMECODE else null end) as cutype23,
		max(case when CUTYPE = 24 then pjMECODE else null end) as cutype24,
		max(case when CUTYPE = 25 then pjMECODE else null end) as cutype25,
		--max(case when CUTYPE = 26 then pjMECODE else null end) as cutype26,
		max(case when CUTYPE = 99 then pjMECODE else null end) as cutype99
		
	from
	(
		select
			MDSENO,
			CUTYPE,
			LISTAGG(to_char(MECODE), ',') WITHIN GROUP(ORDER BY MECODE) AS pjMECODE
			--LISTAGG(to_char(counts), ',') WITHIN GROUP(ORDER BY MECODE) AS pjcounts,
			--LISTAGG(to_char(amounts), ',') WITHIN GROUP(ORDER BY MECODE) AS pjamounts
		from
		(
			select
				MDSENO, CUTYPE, MECODE  --, count(*) counts, sum(amount) as amounts
			from
				lu_yb_sbda_md_temp
			group by
				MDSENO, CUTYPE, MECODE
			order by 
				MDSENO, CUTYPE, MECODE
		) t
		group by
			MDSENO, CUTYPE
	) b
	group by
		MDSENO

　　长->宽，方法二：pivot() within group

select   *
from (
     select
         MDSENO, CUTYPE, MECODE       --, count(*) counts, sum(amount) as amounts
     from
         lu_yb_sbda_md_temp
     group by
         MDSENO, CUTYPE, MECODE
) b 
pivot(LISTAGG(to_char(MECODE), ',') WITHIN GROUP(ORDER BY MECODE)
    for CUTYPE in (0 as cutype0,1 as cutype1,2,3,4,5,6,7,8,9,10,11,12,13, 
        14,15,16,17,18,19,20,21,22,23,24,25,99));
-- for CUTYPE in (select distinct cutype from lu_yb_sbda_md_temp)

　　方法二实例：

select * from 
(select 1 as id, 'a' as x, 3 as v from dual
union
select 1 as id, 'b' as x, 4 as v from dual
union
select 2 as id, 'a' as x, 5 as v from dual
union
select 2 as id, 'c' as x, 6 as v from dual
union
select 2 as id, 'a' as x, 7 as v from dual) t
pivot(sum(v) for x in ('a' as a, 'b', 'c'));

 　　存储过程实现动态行转列

select *
from (
	select hicode, hiname, total, mecode_map as mecode, rate, avgfd
	from lu_consu_mate_mename_0 b
) t
pivot xml(max(rate) as rate, max(avgfd) as avgfd for mecode in (select distinct mecode_map from lu_consu_mate_mename_0))
order by hicode

　　

  　　

参考资料：

Oracle函数篇 - pivot行转列函数

oracle 行转列~列转行（几种方法） 

Oracle行转列、列转行的Sql语句总结

Oracle 11g Pivot函数实现列转行