在许多列sql中分词

Question

我有一个包含这些值的表格列：

Column-desc
------------------
"car broken"
"motorcycle broken"
"motorcycle clean"
"motorcycle clean and broken"
------------------

我需要做一个返回这个的选择：

return-desc1 | return-desc2 | return-desc3 |return-desc4 
------------------------------------------------------
car          |  broken      |              |
motorcycle   |  broken      |              |
motorcycle   |  clean       |              |
motorcycle   |  clean       | and          | broken
-------------------------------------------------------

（是的，max ll返回4 desc）。 我可以在这种情况下使用正则表达式吗？

如果这有帮助：我正在使用Oracle 10g

Answer 1

select
    regexp_substr("Column-desc", '\S+', 1, 1) as "return-desc1",
    regexp_substr("Column-desc", '\S+', 1, 2) as "return-desc2",
    regexp_substr("Column-desc", '\S+', 1, 3) as "return-desc3",
    regexp_substr("Column-desc", '\S+', 1, 4) as "return-desc4"
from your_table

Answer 2

老实说，我的建议是获取column-desc并在编程层上进行拆分工作。这样会更容易，也可能更优化。