示例：
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