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10 Software Mistakes – 10 – Losing facts

You could build any report if you don’t lose the facts


When government regulations have to be implemented, there are always new tables in the Data Warehouse required. And new processes to feed those tables. It takes additional time to implement.


Just use Event Sourcing and store all the facts.


You can replace audit logs and application state with a projection from all the facts. This way any new report is a no-brainer, just another projection.

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