SQL
Learn SQL from the best SQL tutorials, including the most popular SQL online courses, videos, books, podcasts, and blogs.
The SQL Tutorial for Data Analysis
This tutorial is designed for people who want to answer questions with data. For many, SQL is the "meat and potatoes" of data analysis'it's used for accessing, cleaning, and analyzing data that's stored in databases. In particular, this tutorial is meant for aspiring analysts who have used Excel a little bit but have no coding experience.
Complete SQL Mastery
You'll get in-depth knowledge and skills that are built-up sequentially to make sure you don't have any gaps. It takes you from whatever level you're at to advanced skills, without delay - using real-life examples and applicable concepts to get you ready for any SQL job or project
A beginners guide to thinking in SQL
If you're anything like me, SQL is one of those things that may look easy at first (it reads just like regular english!), but for some reason you can't help but google the correct syntax for every silly query.
Then, you get to joins, aggregation, and subqueries and everything you read just seems like gibberish.