转换 table ？使用 pivot / unpivot

Question

我脑袋疼！我想转换下面sql生成的table中的数据。使用数据透视表的示例往往涉及汇总数据。很明显这里我其实是在扩充数据

CREATE TABLE GCS 
(
  EYES VARCHAR2(20) 
, VERBAL VARCHAR2(20) 
, MOTOR VARCHAR2(20) 
, UNITNUM VARCHAR2(20) 
);

Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140560');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('3',4,'2','140729');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('1',2,'6','140771');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140502');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',4,'6','140537');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140566');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140571');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140781');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140780');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('3',4,'5','140788');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140585');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140577');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140747');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140778');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140569');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',1,'6','140575');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140779');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140785');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140753');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140786');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140555');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140557');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140554');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140736');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',4,'6','140745');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140783');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140556');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140559');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140574');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140573');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140572');
Insert into GCS ("Eyes","Verbal","Motor",UNITNUM) values ('4',5,'6','140738');
commit;

变成下面的形式。我确定我需要使用 pivot / unpivot 但不知道如何使用。

Item  | Score | Unitnum
----------
Eyes    4   140560
Verbal  5   140560
Motor   6   140560
Eyes    3   140729
Verbal  4   140729
Motor   2   140729
Eyes    1   140771
Verbal  2   140771
Motor   6   140771

.....等等

Answer 1

您可以使用简单的联合来获取这些值：

select 'Eyes' as Item, Eyes, UnitNum
from GCS
union all
select 'Verbal' as Item, Verbal, UnitNum
from GCS
union all
select 'Motor' as Item, Motor, UnitNum
from GCS

如果需要，您可以按这些列排序，包括刚刚介绍的 'Item':

select 'Eyes' as Item, Eyes, UnitNum
from GCS
union all
select 'Verbal' as Item, Verbal, UnitNum
from GCS
union all
select 'Motor' as Item, Motor, UnitNum
from GCS
order by
  unitnum, item

见SQLFiddle

Answer 2

简单的方法是使用 Unpivot 运算符

select item,
       score,
       unitnum,
from   gcs
       unpivot (score
               for item in(eyes,
                           verbal,
                           motor))

转换 table ？使用 pivot / unpivot

Transforming a table ? using pivot / unpivot

sql

oracle11g

pivot

unpivot

SQLFIDDLE DEMO