Top Five #PostgreSQL Surprises from #Rails Developers, by Andrew Atkinson
https://medium.com/pragmatic-programmers/top-five-postgresql-surprises-from-rails-developers-36d2b8734909
1. Covering indexes and how to use them
2. PostgreSQL data storage in pages and the relationship to query performance
3. Topics related to storing and accessing ordered data
4. Why SELECT * is not optimal, and how to enumerate all table columns in queries to help spot opportunities to reduce the columns
5.Using PostgreSQL for more types of work