A database is a collection of data that is structured to allow for manipulation. There are different kinds of databases—one kind is a relational database. In a relational database, the data is contained in different tables.
SQL (Structured Query Language) is a programming language for interacting with data in a relational database. There are different implementations of SQL—one implementation is SQLite. Different implementations (such as PostgreSQL and MySQL) have their own higher level specialized functions, but the all handle the same basic operations covered today.
We’re going to use SQLite in this session because getting set up requires less work. SQLite is a little different from other implementations of SQL because it operates on regular plain old files and does not require a server connection, unlike PostgreSQL and MySQL. The databases you work with in SQLite exist in .db files that you can store anywhere on your computer.
The database holds your data, but you need some way to interact with the database. We will be using a few Python libraries to do this. SQLite also has a command line utility, which we will not use today.