Sql 将一个查询的X数量结果追加到另一个查询的X数量结果（无外键联接）

此查询返回如下结果：从dwh.product\u count中选择不同的日期

我想附加^s^从该查询返回的结果的数量：

选择不同的p_id dwh.a成员

因此，我的结果如下所示：

5    April, 2013
5    March, 2013
5    February, 2013
5    January, 2013
7    April, 2013
7    March, 2013
7    February, 2013
7    January, 2013
etc....

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什么类型的查询会产生这些结果？

称为交叉联接-只需从两个表中选择，而不进行任何联接conditions@Randy我不知道如何进行交叉连接——只需从两个表中选择，而不进行任何连接conditions@Randy我不确定如何执行此操作，我收到以下错误：错误：错误：中的子查询必须具有别名提示：例如，从选择。。。[AS]foo.我收到以下错误：错误：错误：FROM中的子查询必须有别名提示：例如，FROM SELECT。。。[作为]福。

select id, dt from 
( select distinct p_id as id from dwh.members )
.( select distinct date as dt from dwh.product_count )

5    April, 2013
5    March, 2013
5    February, 2013
5    January, 2013
7    April, 2013
7    March, 2013
7    February, 2013
7    January, 2013
etc....

select id, dt from 
( select distinct p_id as id from dwh.members )
.( select distinct date as dt from dwh.product_count )

select id, dt
from 
    (select distinct p_id as id from dwh.members) s
    cross join
    (select distinct date as dt from dwh.product_count) t