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Class 12: Modeling, continued

Held:

Preliminaries

Updates

News / Etc.

Upcoming work

Good things to do

Data Modeling

  • How do we generally model data in these kinds of applications? (Conceptually, rather than what code do we use.)
  • We normally say that we use a “relational” model. What does “relation” mean here?
  • What general kinds of relationships are there between relations? (and what are examples of each)?
  • Why do we use a DBMS rather than managing things by ourselves?

An Exercise

  • LibraryThing is a shared “keep track of my books” SaaS.
  • For LibraryThing, what relations (tables) do you see as useful? How do you represent them?

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