Many great SQL courses are available online, so it can be challenging to choose the best one. Here are a few popular options to consider:
1: SQL for Data Analysis - Udacity: This course teaches SQL through hands-on projects and covers topics such as querying a database, filtering, grouping, sorting data, and joining tables. It also covers more advanced topics like subqueries and window functions.
2: SQL Tutorial - Mode Analytics: This tutorial covers the basics of SQL, including querying and manipulating data, creating tables, and aggregating data. It also includes interactive exercises to reinforce your learning.
3: SQL Bootcamp - Udemy: This comprehensive course covers SQL fundamentals and more advanced topics like indexing, subqueries, and data modeling. It also includes practical projects to apply your knowledge.
4: Introduction to SQL - Khan Academy: This free course covers SQL basics, including querying data and filtering results. It also includes interactive exercises and quizzes to test your understanding.
5: SQL Crash Course - Stanford University: This course is designed for beginners and covers SQL basics like querying, filtering, and sorting data. It also includes hands-on exercises to practice your skills.
and many more courses are available on the internet, and you can also go with video tutorials on YouTube. I saw many SQL tutorials for beginners and for advanced developers available there. I hope this will help you.