Heroku Postgres is accessible via any programming language by the connection driver of PostgreSQL; this includes all languages and frameworks supported by Heroku, such as Java, Ruby, Python, Scala, Play, Node.js, and Clojure.
You can add the Heroku Postgres add-on in two different ways: via the Heroku add-ons gallery or the Heroku client.
Heroku offers a gallery of add-ons for your applications, this gallery is available at https://addons.heroku.com/.
Heroku add-ons gallery
In the Data Stores area, you can find the Heroku Postgres add-on or you can find it at https://addons.heroku.com/heroku-postgresql.
As shown in the first chapter, this add-on has many plans that change according to the functionality of the cache size, storage limit, the simultaneous connection limit, high availability, and the ability to...