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 ...

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 ...