Web development quizzes

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

A primary key column can contain NULL values.
False
True

This query is correct: SELECT * FROM employee WHERE age BETWEEN 20 AND 25;
False
True

You can have several PRIMARY KEY constraints per table.
False
True

This query is correct: SELECT * FROM employee ORDER BY age DESC;
False
True