Javascript has both null and undefined and I'm not sure that's a good idea.
At least in SQL we only have one of them, but it can mean unknown or it can mean N/A or even false. It's like a joker, what it means depends on how you use it.
No, it's not those other things, that's just using the tool incorrectly. A NULL is definitely "we dont know", not false, not N/A, especially not any known value.
Yes and I think that Clojure handles nil pretty well, and it's a functional programming language like SQL. It's also interesting to see that Typescript has added an unknown type. So something that's a value in SQL (null being unknown) is a type in TS.
