The idea is to make as simple as possible of an app to get started with some practical database knowledge.
https://www.youtube.com/watch?v=re3OIOr9dJI
Following this medium article now. Seems like a good overview:
https://medium.com/@rwilliams_bv/intro-to-databases-for-people-who-dont-know-a-whole-lot-about-them-a64ae9af712
single action taken on a database; a request in a predefined format. Kinda like an api/function call.
SELECT, INSERT, UPDATE, DELETE
e.g. SELECT ToolName FROM Wrenches
a sequence of queries (operations/actions) that make up a single unit of work performed against database.
e.g. Two UPDATE operations to reduce A's balance by 20 and increase B's balance by 20.