如何在Oracle SQL Developer下创建输出？

Question

我有两张表用表名＆＃34;书＆＃34; ，＆＃34; Params＆＃34;如

Input tables are attached

我需要一个输出，如下图所示：

I need an output as in below format

Answer 1

你可以使用聚合来转动params表，然后将它与books表连接起来，如下所示：

select b.*, p.author, p.issue_date
from books b
left join (
    select id,
        max(case when Attr_id = 'Author' then Others end) as author,
        max(case when Attr_id = 'Issue Date' then Others end) as issue_date
    from params
    group by id
    ) p on b.id = p.id
order by id;

产地：

id  name    author  issue_date
101 Sumit   Bhagat  
102 Ben     Sinha   2005
103 Amit