oracle 逗號分割，列轉行，行轉列

SQL代碼 列轉行

select
REGEXP_SUBSTR(a.rolecode ,'[^,]+',1,l)
rolecode
from (
select 'a,aa,aaa' rolecode from dual
) a,
(SELECT LEVEL l FROM DUAL CONNECT BY LEVEL<=100) b
WHERE l <=LENGTH(a.rolecode) - LENGTH(REPLACE(rolecode,','))+1  

 

或者

with a as (select 'ABC,AA,AD,ABD,JI,CC,ALSKD,ALDKDJ' id from dual)
select regexp_substr(id,'[^,]+',1,rownum) id from a
connect by rownum <= length(regexp_replace(id,'[^,]+'))

 

SQL代碼 行轉列

 

select name,coures,to_char(wmsys.wm_concat(xxx.score)) c 
 from 
 
 
  (select '小明' name,'語文' coures,90 score  from dual
 union all
 select '小明' name,'語文' coures,91 score  from dual
  union all
 select '小明' name,'數學' coures,90 score  from dual
 union  all
 select '小明' name,'數學' coures,91 score  from dual) xxx
 
  group by xxx.name,coures