Most modules and developments on PrestaShop require you to use or enter information on a database. Any developer sees the core DB class as an essential part of the process.

On top of providing potential abstraction for other types of relational database, the DB class has several tools to make life simpler!
Learn about the various methods, when to use them and the best practices for the development stage.

A similar article was written about the usage of the 1,4, and this article will present in the same way but for the 1,5 version. At the bottom of the page, you will also find the main differences between the 1,4 and 1,5 as far as these classes are concerned.