Quizzes de desarrollo web

NULL is exactly the same as empty string.
False
True

AVG() returns the average of a numeric column.
False
True

Michael Widenius was one of the founders of MySQL.
False
True

SQL injection is a technique where malicious users inject SQL commands into an SQL statement, via website input.
False
True

This query is correct: SELECT * FROM employee WHERE age IN (20,21,22);
False
True