I found that mostly easy when you have the complete changelog available, and hard otherwise.

If your database structure writes a log or a change history for its rows, you can retrieve that history and replay it to the client. If you want to look at a real database, consider parsing the write ahead logs or replication logs, as these usually replay all the actions on rows.

There are specialized databases that basically store these logs together with the row data. I believe "Event Sourcing" is the buzzword for that. They seem to be separate from actual SQL databases though.

If you need to create the diff from thin air, it's usually not hard to generate the diff if you can find something close enough to the client state (daily backup) and the current state.

In short, I'm unaware of a premade solution to this.

In reply to Re: Retrieve changes in remote dataset by Corion
in thread Retrieve changes in remote dataset by hippo

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