he most efficient way of storing information for processing is a database. Fortunately, there are Open Source databases that fit the bill for any type of data storage and retrieval requirements. The most popular of these is MySQL, which is the database we will deal with in this course.
PostgreSQL is another excellent database package which I also use. It has some advantages over MySQL but it enjoys a smaller user base. There are also some things that are more difficult to do with PostgreSQL than with MySQL, so as a study tool, MySQL serves me somewhat better. I don't wish to downplay PostgreSQL's importance in any way. It is another top-rate database for Linux systems and I encourage you to install it and try it.