TLDR
As you get into the Databases and Data Science, the first thing that you have to master is the relations between entities in your database. This is important because the data that you use has to be absolutely efficient for its further implementations. For this Database, I am going to use Modified Chen Notation. Chen’s notation for the entity-relationship modeling uses rectangles to represent entity sets, and diamonds to represent relationships appropriate for first-class objects. If an entity set participates in a relationship set, they are connected with a line.via the TL;DR App
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