A list of SQL resources that I've found useful for learning and practicing SQL

1. DataLemur - Ace the SQL & Data Science Interview. Has numerous free questions for SQL that you can try and also get hints on how to solve the question.
2. PostgreSQL Exercises - Loads of great questions that you can try out with the expected results listed.
3. Advanced SQL Window Function Quiz - Test your knowledge of Modern SQL Window Functions
4. HackerRank - Practice coding challenges & prep for interviews / Network
5. DataCamp - Grow your data skills with DataCamp
6. Select Star SQL - An interactive book to learn SQL on a real dataset.

Gamified SQL Resources

1. The SQL Murder Mystery - Solve a Murder Mystery using your SQL Skills
2. SQL PD - Learn SQL while solving crime - Build queries by drag and drop.

Handy Resources

1. SQL Style Guide - An excellent guide for making sure your code is readable.
2. dbdiagram.io - A free, simple tool to draw database diagrams (ERDs) by typing DSL code. dbdiagram uses the popular DBML (Database Markup Language).
3. ChatGPT - While far from perfect I've found it a good resource to help get explanations for SQL code I've come across as well as a quick way to generate explanations to share with others for code I've written.
4. Phind - AI search engine for Developers

More to come

• Last edited: 2023-12-20 12:20 PST