我有两个表假设表'friendship'与列f1,f2和'people'与列p_id,p_name。
firendship:=>
f1 f2
--------
01 10
02 11
03 12
人:=>
p_id p_name
------------
01 Vijay
02 Ajay
03 Gaurav
10 Sunny
11 Amit
12 Sandeep
我想要像这张表那样的结果
结果表应为:=>
f1 f1_name f2 f2_name
------------------------
01 Vijay 10 Sunny
02 Ajay 11 Amit
03 Gaurav 12 Sandeep
我尝试使用Union两个表但无法找到准确的结果
答案 0 :(得分:2)
SELECT a.p_id f1, a.p_name f1_name, b.p_id f2, b.p_name f2_name FROM People a JOIN friendship f ON (f.f1 = a.p_id) JOIN People b ON (f.f2 = b.p_id)
答案 1 :(得分:0)
我认为这可以解决您的问题。
select a.f1, c.p_name, b.f2, c.p_name
(select * from tablea) as a,// which have f1 and f2 columns
(select * from tablea) as b,
(select * from people) as c
where a.f1=c.p_id and b.f2=c.p_id
答案 2 :(得分:0)
您需要加入此
select f1, p.p_name as f1_name , f2, p1.p_name f2_name
from firendship as f
inner join People as p on f.f1=p.p_id
inner join People as p1 on f.f2=p1.p_id