PGExercises provides a series of questions and explanations built on a single, simple dataset. It's designed for use as a partner to a good book or Postgres' excellent documentation.

#sql #postgresql #exercise #practice #database #db #quiz #question #answer #practical #awesome


https://pgexercises.com

A simple sandbox to test and share MongoDB queries online.

#mongodb #db #mongo #play #learn #playground #test #online #nosql #sql #database

https://mongoplayground.net