So I have a method:int Foo()It either returns a value if successful or NULL if not. If I'm not mistaken, if I try something like:int bar; bar = Foo();and Foo() returns NULL, then my program will ...

Null means "undefined" in SQL, so numerous online services don't think Christopher Null exists.

If you do, you'll have a problem at runtime. But -- and this is so important -- you'll be notified of the problem not when the null pointer is used, which could be a long way from the mistaken code ...

IS NULL and IS MISSING are predicates that test for a missing value. IS NULL and IS MISSING are used in the WHERE, ON, and HAVING expressions. Each predicate resolves to true if the sql-expression's ...