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But COUNT is just a SUM over ones for every row in the output
by heavenlyblue 6y ago
But COUNT is just a SUM over ones for every row in the output
- tsimionescu 6y agoBy what definition? If anything, sums are defined as cardinalities of sets, rather than defining cardinalities in terms of sums.
- heavenlyblue 6y agoThen what is a NULL cardinality?