Free Resources to crush SQL
 

Blogs :

SQL Blog - KDNuggets [LinkedIn]
SQL Topic Blogs - Medium [LinkedIn]
Learning SQL Blog - Medium
Alex The Analyst - YouTube [LinkedIn]
Ankit Bansal - YouTube [LinkedIn]
TechTFQ - YouTube [LinkedIn]
Kudvenkat - YouTube

Practice :

SQLBattle
Schemaverse
SQL Murder Mystery [LinkedIn]
Codewars
HackerRank
LeetCode (Freemium)
Ace The SQL Interview - DataLemur [LinkedIn]
SQL Concepts - Data.World

AI Tools :

AirOps AI Data Sidekick
AI2SQL

Courses :

SQL Tutorial - SQLcourse .com
Relational Database - freecodecamp
Awesome Repo (Databases Section)
SQL Tutorial - SQLtutorial .org
SQL Tutorial - W3 Schools
SQL Tutorial - Mode
SQL Tutorial - tutorialspoint .com [LinkedIn]
SQL Tutorial - Bipp .io [LinkedIn]
SQL Tutorial - geeksforgeeks