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> More seriously, it's a columnar data store, not a relational database.

Could you explain why you don't think ClickHouse is relational? The storage is an implementation detail. It affects how fast queries run but not the query model. Joins have already improved substantially and will continue to do so in future.

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The storage is not just an implementation detail because it affects how fast things run, which affects which tasks it's better or worse for. There's a reason people reach for a columnar datastore for some tasks and something like postgres or mysql for other tasks, even though both are technically capable of nearly the same queries.

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