Quizzes de desarrollo web

NULL is exactly the same as empty string.
False
True

A foreign key declaration can include this: ON UPDATE CASCADE.
False
True

The HAVING statement must be used along with the GROUP BY statement.
False
True

MySQL is (as of March 2014) the world's second most widely used open-source RDBMS.
False
True

The first version of MySQL appeared on 23 May 1981.
False
True