any and all

Python has two builtin functions for evaluating iterables for truth/falseness: any() and all(). any() returns true if any member of the iterable evaluates to True, while all returns True only if every single member of the iterable evaluates to True.

>>> any([True, False, False])
True
>>> any([False, 0])
False
>>> all([True, 0])
False
>>> all([1])
True
>>> all([1, 1, True])
True

There are identically named subquery operators in sql, however they are only really useful for correlated subqueries which are poorly optimized and generally to be avoided in the current versions of mysql.