Spring 如何使用connect by将逗号分隔的值拆分为列

我有一个小于的列，您可以按如下方式使用multiset和hierarchy查询：

Select user_name, 
       listagg(market_code, ',') within group (order by pos) as market_code,
       In_use
  From
(Select user_name, 
       regexp_substr(market_code, '[^,]+',1, column_value) as market_code, 
       in_use,
       column_value as pos
  From t,
       table(cast(multiset(
         select level from dual 
         connect by level <= length (regexp_replace(t.market_code, '[^,]+'))  + 1
        ) as sys.OdciNumberList)) levels) t
  Where market_code in ('EUP','APCAC')
  Group by user_name, in_use
  Having count(distinct market_code) = 2

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上面的查询显示了count=2的用法，由于我们使用了count=2，您可以在for或和查询中使用count=1和相应的市场代码

谢谢。理解你的答案花了一些时间。这就解决了问题。