SQLはここで三台

Question

参加は私のテーブルです..and私はこの出力をしたい：

pid | pname | custname | quantity | total base price | sale price | profit 

はスキーマ：

create table customers 
(
    cid int, 
    cname varchar(1000), 
    cg varchar(1000) 
) 

create table prod 
(
    pid int, 
    pname varchar(1000), 
    baseprice int, 
    saleprice int 
) 

create table orders 
(
    oid int, 
    custid int, 
    pid int, 
    quantity int, 
    odate date 
) 

私はこのためにクエリを記述するにはどうすればよいですか？

Answer 1

--pid | pname | custname | quantity | total base price | sale price | profit 
select o.pid, p.pname, c.cname AS custname, SUM(o.quantity) AS quantity, 
SUM(p.baseprice) AS 'total base price', SUM(p.saleprice) AS 'sale price', 
SUM(p.baseprice) - SUM(p.saleprice) AS profit -- change this math to what you need 
from orders o join prod p 
on o.pid = p.pid 
join customers c 
on o.custid = c.cid 
group by o.pid, p.pname, c.cname 

Answer 2

select 
    a.pid , 
    a.pname , 
    c.cname , 
    b.quantity , 
    a.baseprice * b.quantity as TotalBasePrice , 
    a.saleprice*b.quantity as TotalSalePrice , 
    a.saleprice*b.quantity - a.baseprice * b.quantity as profit 
from prod as a 
    inner join orders as b on a.pid = b.pid 
    inner join customers as c on b.custid = c.cid