MongoDB等于SQL，带有子句？
我想用SQL的子句查询某些内容，查询：
with t1 as(
select field1, field2, calculatedField
from table1
),
t2 as (
select field1, field2, calculatedField
from table 2
)
select a.*, b.*
from t1 as a
left join t2 as b on a.field1 = b.field1
如何在MongoDB中实现这一目标？我找不到的MongoDB中的操作员
I want to query something with SQL's WITH clause, query:
with t1 as(
select field1, field2, calculatedField
from table1
),
t2 as (
select field1, field2, calculatedField
from table 2
)
select a.*, b.*
from t1 as a
left join t2 as b on a.field1 = b.field1
how can I achieve this in mongodb? i can't find an operator in mongodb for WITH
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