Logical table having more than one Logical table sources

Hi ,
Is it possible a logical table has 2 logical table sources and there is no join between the underlying table of logical table sources?
What will happen if we create the request which contains one attribute from each source?
Will BI server return records with Cartesian join?
Is it mandatory if logical table is having more than one logical table sources(exp. Logical table sources are X,Y and underlying table is A,B respectively),
The underlying tables (A&B) must be joined ?
Can someone explain the logic behind the logical table sources? How does it work?
Any reference of document will be appreciable.
Thanks,Ashish

Hi Stijn,
Thanks for response.
You are saying that Oracle BI server will run a query against both tables and combine the results. But if there is no possibilty of any type of join, how BI server will combine the results from both tables.
I have a scenario like below -
Suppose i have 2 tables A and B at physical layer. Both table contains the information of any common subject area.
But there is no attribute is common between A and B so not any kind of join possible between two.
Now if i create a logical table with 2 logical table source A and B and create any request having one column from A and one from B ,
What will happen? How BI server will combine the result? Will BI server not result records after Cartesian join.
How can i model this scenario?

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