如何在Oracle中获取给定样本数据的所需输出？

Question

我的样本数据

Table A

col1    col2
------------------------------- 
1       1,2,3
2       1,2,4,5

必需输出

col1  col2
-------------------------
1     1
1     2
1     3
2     1
2     2
2     4   
2     5

如何在oracle中获得所需的输出？提前致谢

Answer 1

这是一个选项：

SQL> with test (col1, col2) as
  2  (select 1, '1,2,3' from dual union
  3   select 2, '5,6,7,8' from dual
  4  )
  5  select col1, regexp_substr(col2, '[^,]+', 1, column_value) col2
  6  from test,
  7       table(cast(multiset(select level from dual
  8                           connect by level <= regexp_count(col2, ',') + 1)
  9                  as sys.odcinumberlist))
 10  order by col1, 2;

      COL1 COL2
---------- -------
         1 1
         1 2
         1 3
         2 5
         2 6
         2 7
         2 8

7 rows selected.

SQL>