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I wonder how Codd's original relational algebra handled this case, as he didn't have NULL cells.
by cubefox 3y ago
I wonder how Codd's original relational algebra handled this case, as he didn't have NULL cells.
- Mikhail_Edoshin 3y agoThis part I do not know, but NULLs are either Codd’s idea or the one he sided with. Another example when an invention goes against the established logic would be quaternions.
- at_compile_time 3y ago>Another example when an invention goes against the established logic would be quaternions. How so?
- bazoom42 3y agoI don’t think it had outer joins.