oracle max decode豎表改橫表

1、oracle ：max+decode 豎表改橫表

展示爲

 

select a.project_id,
       max(decode(a.vote_result, '01', a.zaiyi, 0)) as v1,
       max(decode(a.vote_result, '02', a.zaiyi, 0)) as v2,
       max(decode(a.vote_result, '03', a.zaiyi, 0)) as v3
  from 表 a
 group by a.project_id
 

2、補充：decode()函數說明

decode(條件字段，條件值，返回值，返回值)