只有 Oracle 11G 支持的 unpivot函数

只有Oracle 11G才支持的行列转置的函数 UNPIVOT


操作代码如下

drop table t;
CREATE TABLE T (ID NUMBER,phonetype VARCHAR2(10),qhd VARCHAR2(10),ts varchar2(10),bd varchar2(10));
INSERT INTO T VALUES ( 1,'htc', '02'     ,'03','05'   );
INSERT INTO T VALUES ( 2,'moto', '05'     ,'08','06'   );
INSERT INTO T VALUES ( 3,'se', 'oracle' ,'mysql','07');


select * from 
(
  select id, col, val
    from t
    unpivot ( val for col in (qhd,ts,bd) )
)

PS 此代码来自  http://alafqq.iteye.com/blog/908336