Database Normalization + Denormalization ?

While porting Hits from Node.js (with a filesystem "db") 🐌 to Phoenix 🚀with PostgreSQL 🐘
for: https://github.com/dwyl/product-roadmap/issues/7 / https://github.com/dwyl/hits/issues/66 ... 📈

It occurred to me that I'm making a rather large _assumption_ about people's technical knowledge/experience of Database design in general and **`normalization`** _specifically_ 💭

People who have never read a text book on databases will most likely not have an immediate _intuition_ as to how to structure a database for efficient storage and retrieval.

# Todo

+ [ ] add a section to the tutorial #51 explaining _why_ we have chosen to normalize the data for efficient storage and querying.

+ https://en.wikipedia.org/wiki/Database_normalization
+ https://en.wikipedia.org/wiki/Denormalization