NOT OPERATOR: The NOT operator is an extremely useful operator for working with the previous two operators we introduced: IN and LIKE. By specifying NOT LIKE or NOT IN, we can grab all of the rows ...

The book "MySQL Practical Tutorial" is a free ebook, used in introduction to the basic knowledge and development techniques of MySQL database. This book emphasizes practicality, takes multiple ...

In this tutorial, we will step through installing PostgreSQL, connecting to the database, loading some data, and running a variety of SQL queries.