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I like microservices owning their databases. It allows you to choose the correct database for the job and for the team. Sharing state across these microservices is often a bad sign for how you’ve split your services. Often a simple orchestrator can aggregate the relevant data that it needs.

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Are you talking about different DBs, or just different tables? If it's just different tables, they can operate sufficiently independently if you design them that way, so you can change the schema on one table without messing up the others.

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