示例：
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with temp as
(select '1,2,3' nums, 'a' names from dual
union all
select '4,5' nums, 'b' names from dual
union all
select '6,7' nums, 'c' names from dual
union all
select '8' nums, 'c' names from dual
union all
select '9,10' nums, 'c' names from dual
union all
select '11,12' nums, 'c' names from dual
union all
select '13,14' nums, 'c' names from dual
union all
select '15,16' nums, 'c' names from dual
union all
select '17,18' nums, 'c' names from dual
union all
select '19,20' nums, 'c' names from dual
union all
select '21,22,23,24,25,26,27,28,29,30,31,32,33,34' nums, 'c' names from dual
)
select regexp_substr(nums,'[^,]+',1,b.lv) order_num,names
from temp, (select level lv from dual connect by level<=(select max(length(regexp_replace(nums,'[^,]+'))+1) from temp)) b --用于分配行数（行数取最大的nums分隔数）
where b.lv <=length(regexp_replace(nums,'[^,]+'))+1 order by order_num
网站题目：oracle批量列转行逗号分隔
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