Database Practice Exercises

Design tables, write queries and work with relational, document and key-value databases.

3 paths · 20 challenges

More soon
mongodb
MongoDB
4 challenges · 1 module
java-25Java 25nodejs-24Node.js 24python-312Python 3.13
Documents, BSON & CRUD Basics
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postgresql
PostgreSQL
12 challenges · 4 modules
PostgreSQLPostgreSQL
Data Types & Table Design
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redis
Redis
4 challenges · 1 module
java-25Java 25nodejs-24Node.js 24python-312Python 3.13
Strings & Key Basics
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From the blog

2
Every Mongoose query, one pageA bookmarkable Mongoose cheatsheet — finding, filtering, projection and sorting, pagination, updates, populate, and lean() for performance.How to design a MongoDB schemaA reference for modelling decisions in MongoDB — embed vs reference, designing around queries, indexing, patterns, and the anti-patterns to avoid.

Frequently asked questions

3

Which paths are in this category?

3 paths: MongoDB (4 challenges), PostgreSQL (12 challenges) and Redis (4 challenges).

How many challenges are there?

20 challenges across 6 modules.

Do I need to install anything?

No. Every challenge runs in a browser-based IDE with everything already set up, and your code is graded automatically against a test suite.

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