Roadmaps
Community-curated paths to learn to code. Pick one and a squad forms around you — you finish it together, not alone.
Community-curated paths to learn to code. Pick one and a squad forms around you — you finish it together, not alone.
Learn the language of data: querying, joins, modeling, indexes, and transactions with PostgreSQL — a skill every developer and analyst needs.
Tables, rows, primary and foreign keys — how relational databases organize data.
Filter, sort, and shape result sets with WHERE, ORDER BY, and LIMIT.
Combine tables and summarize data with GROUP BY and aggregate functions.
Design schemas that avoid duplication and stay consistent as they grow.
Understand how indexes work and how to make slow queries fast.
Keep data correct under concurrency, then drill everything with real exercises.