✅ 7 Websites to Learn Data Analytics for free 😎 You don’t have to spend money to learn data 1. SQLBolt SQLBolt provides a comprehensive introduction to SQL (Structured Query Language). SQL is a must-have skill in data analytics. With SQL skills, you can work with relational databases to process and structure data. 2. Excel Practice online This website provides the tools you need to practice and learn Excel. Excel is a popular Microsoft spreadsheet program. 3. Tableau Tableau is a popular data a