将行转置为db2中的列

Question

我有如下查询输出

Customer policytype plan amount 

Sam      ulip       P1   250

Sam      ulife      u1   435

Sam      Ulip       P2   370

Hazar    Ulip       P1   679

Hazar    Ulife      u1   567

等等 ....

我需要如下转置上面的输出

Customer ulip ulife

Sam      250  435

Sam      370  Null 

Hazar    679  567

有人可以帮助我在db2中实现以上结果吗

Answer 1

使用conditional Aggregate

SELECT customer,
        Max(CASE WHEN policytype = 'ulip' THEN amount END) AS ulip,
        Max(CASE WHEN policytype = 'ulife' THEN amount END) AS ulife
FROM   Youratable
GROUP  BY customer,
            CASE WHEN plan IN ( 'p1', 'u1' ) THEN 1 ELSE 0 END