4 exercises found
Data in a relational database is split across tables on purpose. JOINs let you bring it back together when you need it — without duplicating storage.
Master the art of picking the right database for the job - because using the wrong one is like bringing a spoon to a knife fight!
A database is an organised collection of data stored so it can be quickly found, updated, and queried. SQL is the language you use to communicate with it.
Learn practical backup approaches that protect against data loss. Start simple, scale as needed.