雪花：加入两个选择语句

Question

免责声明：SQL和雪花的新手 ...因此在您从事反消费者滥用行为之前...

假设我有两个选择语句：

select foo,bar from baz as b;

select foo,bar,gee,whiz from qaz as q;

假设第二条选择语句具有联接：

select foo, bar, gee, whiz from qaz as q

left join data as d on (d.gee = q.gee)
where d.whiz = q.whiz
and q.foo is not NULL

现在，如何将这两个不同的选择组合到左联接中？

select foo,bar from baz as b
left join

( select foo, bar, gee, whiz from qaz as q
  left join data as d on (d.gee = q.gee)
  where d.whiz = q.whiz and q.foo is not NULL
) this

on b.foo = this.foo
where b.bar = this.bar
order by b.foo desc
limit 1 

以上操作无效。本地计算以上内容是不可能的：只有20,000行，熊猫获得了20GB以上的内存。如何使用Snowflake计算此数据集？