50 cards
This deck is a practical introduction to MongoDB, one of the most widely used NoSQL databases. The cards walk you through the core concepts step by step, starting with the basics like the document model, BSON, and ObjectIds, before moving into the hands-on skills you'll actually use day to day, such as inserting, querying, updating, and deleting documents. You'll also get familiar with query operators and the aggregation pipeline, including key stages like $match, $group, $project, $lookup, and $unwind.
It's a great fit for developers who are new to MongoDB or switching over from a relational background, as well as students preparing for interviews or certifications that touch on NoSQL topics. If you already know SQL and want to understand how a document-oriented database thinks about data differently, this deck gives you a focused way to build that mental model without getting lost in dense documentation.
To get the most out of these cards, try to connect each concept to a real example as you study. For instance, when you review a stage like $lookup, think about how you'd join two collections in a project of your own. Because the deck mixes theory and commands, spacing your review over several short sessions will help the syntax stick better than one long cramming session, and revisiting the CRUD cards alongside the aggregation cards will reinforce how the pieces fit together.