SQL (pronounced S.Q.L. or Sequel, no one really cares) stands for Structured Querying Language and is a language that is used to query, form, and manipulate databases.
SQL Course Public Downloads Folder - Google Drive
For this tutorial we're going to be using SQLite which is a database engine that works in a single application. In order to access it we'll be using DBeaver. DBeaver is an open-source database manager that connects to almost all database engines.
NOTE: Use DBeaver Community, it's free