I'm working on a project where i should update the Main database with data from mobile databases that are offline not synchronized all the time with the main database. i've already worked worked with on the same problem in the past, the sync was simply copying data from mobile to the main database then change IDs and foreign keys to keep database integrity but this is not a simple process, especially when consider updates and deletes occurring on the mobile side and sync them .
What are the best practices for this kind of problem (Distributed offline databases) ?
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