Storage
Datasette
You will notice the use of Datasette, an open-source multi-tool for exploring and publishing data, their official site is Datasette
Datasette is a tool for exploring and publishing data. It helps people take data of any shape or size and publish that as an interactive, explorable website and accompanying API.
Refer to its dedicated page in the SQL site - Datasette Tool
RDBMS
Aside from techniques to design a database, using ERDs, normalization of tables, the use of keys and constraints, this section will cover: