oracle pivot 和 unpivot 函数的使用

发布时间：2020-12-12 13:29:03 所属栏目：百科来源：网络整理

导读：pivot的格式 select from ( inner_query) pivot(aggreate_function for pivot_column in ( list of values)) order by ...; 用法举例: select from ( select month,prd_type_id,amount from all_sales ) pivot (sum(amount) for month in (1 as JAN,2 as FEB

pivot的格式
select from
( inner_query)
pivot(aggreate_function for pivot_column in ( list of values))
order by ...;
用法举例:
select
from (
select month,prd_type_id,amount
from all_sales
)
pivot (sum(amount) for month in (1 as JAN,2 as FEB,3 as MAR,4 as APR)
)
order by prd_type_id

转换多个列
select * from
(select month,amount
from all_sales
)
pivot(sum(amount) for (month,prd_type_id) in (
(1,2) as JAN_P2,(2,3) as FEB_P3)
);

在转换中使用多个聚合函数
select * from (select cust_no,mag_man_cert_type,t.mag_man_cert_no,mag_man_type from L_CIF_ENT_CUST_MAG_MAN_INFO t
pivot (max(mag_man_cert_NO) as no,max(mag_man_cert_type) as type for mag_man_type In (‘01‘ as GLR01,‘02‘ as GLR02,‘03‘ as GLR03));

unpivot可以实现列转行,所转的列的字段类型必须一致unpivot 的用法举例：select * from PIVOT_SALES_DATE unpivot (amount for month in (JAN,FEB,MAR,APR));

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!