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sql - Oracle - 将行转入列

问题描述

我想将以下行结果转换为列。我正在考虑 PIVOT，但我不相信我能达到预期的结果。

原样：

ID_NCM | DESTINATION | START      | END  
36393  | PE          | 01-01-2018 | 10-31-2018
36393  | PE          | 11-01-2018 | 12-31-9999

成为：

ID_NCM | DESTINATION | CURRENT_START | CURRENT_END | FUTURE_START | FUTURE_END
36393  | PE          | 01-01-2018    | 10-31-2018  | 11-01-2018   | 12-31-9999

我是否在这里遗漏了一些表结构概念，从而无法通过 select 语句实现所需的布局？

谢谢。

标签： sqloracleoracle12ctranspose

解决方案

你可以直接使用grouping by ID_NCM,DESTINATIONwithmin和maxfunctions as ：

with t(ID_NCM,DESTINATION,"START","END") as
(  
 select 36393,'PE',date'2018-01-01',date'2018-10-31' from dual union all
 select 36393,'PE',date'2018-01-11',date'9999-12-31' from dual 
)
select ID_NCM,DESTINATION,
       min("START") as CURRENT_START,min("END") as CURRENT_END,
       max("START") as FUTURE_START,max("END") as FUTURE_END
  from t
 group by ID_NCM,DESTINATION

ID_NCM  DESTINATION CURRENT_START  CURRENT_END   FUTURE_START  FUTURE_END
------  ----------- -------------  ------------  ------------  -----------
36393       PE       01.01.2018     31.10.2018    11.01.2018   31.12.9999

PSSTART和END是 中的保留关键字Oracle，因此用双引号将它们包裹起来。

编辑：由于您的最后评论，您可以通过添加相关子查询来进行更改，如下所示：

with t(ID_NCM,DESTINATION,"START","END",tax_rate) as
(  
 select 36393,'PE',date'2018-01-01',date'2018-10-31',0.06 from dual union all
 select 36393,'PE',date'2018-01-11',date'9999-12-31',0.04 from dual 
)
select ID_NCM,DESTINATION,
       min("START") as CURRENT_START,min("END") as CURRENT_END,
       max("START") as FUTURE_START,max("END") as FUTURE_END,
       (select tax_rate from t where "START"=date'2018-01-01' and "END"=date'2018-10-31') 
                                                                         as current_rate,
       (select tax_rate from t where "START"=date'2018-01-11' and "END"=date'9999-12-31') 
                                                                         as future_rate
  from t
 group by ID_NCM,DESTINATION

ID_NCM  DEST   CURRENT_START  CURRENT_END  FUTURE_START  FUTURE_END CURRENT_RATE FUTURE_RATE
------  ----- -------------  ------------  ------------  ----------- ----------- -----------
36393   PE     01.01.2018     31.10.2018    11.01.2018   31.12.9999     0,06          0,04

编辑 Rextester 演示

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