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An outer join a Cartesian product is not. Even if you stick to ordinary (inner) joins, they are pullbacks, not products. https://en.wikipedia.org/wiki/Pullbac
by catnaroek 9y ago
An outer join a Cartesian product is not.
Even if you stick to ordinary (inner) joins, they are pullbacks, not products.
https://en.wikipedia.org/wiki/Pullback https://en.wikipedia.org/wiki/Pullback
- falcor84 9y agoD'oh, sorry, I meant "cross join"