sql - 与源表不同的表上的 SQL 连接

Question

我有以下 SQL 语句：

select distinct
  u.id, 
  v1.code,
  v2.code,
  a1.phone,
  a1.phone1,
  SUM(o1.totalprice) as SALES
  SUM(ot4.numbers) as NUMBERS
from 
  users u,
  orders o2
 inner join values v1 on v1.pk = u.gender
 inner join values v2 on v2.pk = u.egistration
 inner join addresses a1 on a1.owner = u.pk 
 inner join orders o1 on o1.userpk = u.pk
 inner join orderthings ot4 on ot4.orderpk = o2.pk 
where 
  u.cccustomer = 1
and
  v2.code = 'REGISTERED'
group by
  u.id, 
  v1.code,
  v2.code,
  a1.phone,
  a1.phone1
order by 
  id;

基本上订单上的连接不起作用，但我需要在与用户 u 无关的两个表上获取附加关系。我怎样才能做到这一点？

Answer 1

根据您的示例 SQL Fiddle，如果您的表彼此不相关，那么您可以使用 aCROSS JOIN来加入它们，类似于：

select u.Email, 
  v1.String Gender, 
  v2.String Title, 
  o.a_string, 
  o.o_string
from users u
inner join value v1
   on u.Gender = v1.PK
inner join value v2
   on u.Title = v2.PK
cross join
(
  select a.PK, a.string a_string, o.string o_string
  from another a
  inner join other o
    on a.PK = o.PK
) o;

请参阅带有演示的 SQL Fiddle