All records are coming from both tables. That's how JOIN works.

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>I know the title is not very clear and what I am looking for should not be hard. But I just can't get it (blame it on Friday or spring).
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>Anyway. A SQL Select creates a query with one table JOINed with another. My question is, how can I determine which record in the query came from the 1st or the 2nd table in the JOIN? I realize that at least one record in the query came from both tables. So if I can determine this (joint) record, it would be helpful too.
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>Thank you in advance.