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Collection vs Document
I'm confused about the structure of Databases.
We have Database -> Collection -> Document -> Attributes. This somehow seems to be one layer too much.
I want documents that contain additional information about users, e.g. how many products they bought, favourite product, ...
How should I structure my Database? I thought of
[Database] UserInfo -> [Collection] ??? -> [Document] User1 -> [Attributes] all attributes of this user.
What should "collection" be? Or do I have a fundamental misunderstanding of how databases are supposed to be structured?
TL;DR
Confusion about database structure. Instead of Database-Collection-Document, consider Database-[Collective Name]-Document. For user info, use Database User Info-[Collection Name]-User1-[Attributes].