Thanks Jonathan for pointing out the direction, it is very helpful to know 
where I can find more info.

On Friday, August 14, 2015 at 5:06:09 PM UTC-7, Jonathan Vanasco wrote:
>
> Well, this problem doesn't really have anything to do with SqlAlchemy -- 
> you should probably ask people for advice on the Sqlite lists or Stack 
> Overflow.
>
> You can segment out your database into 3 files using the example above. 
>  You will just run into an issue where -- because there isn't a 
> two-phase-commit available in Sqlite, you will need to decide how to handle 
> situations like (but not limited to):
>
> - the first and second databases committed, but the third database raised 
> an error (you need to undo in the application)
> - the first and second databases committed, but your application was quit 
> before the third database could commit (you need to undo from another 
> application)
>
> You will have to decide how to handle that at the application and database 
> levels, and then SqlAlchemy can be used to implement that strategy. 
>
> I just want to be clear -- your concern right now is on the best way to 
> use Sqlite to solve your problem -- not use Sqlalchemy.  Once you figure 
> that out, people here can be more helpful.
>

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