MySQL
  1. Introduction to databases
  2. Introduction to MySQL
  3. Manipulation
  4. Queries
  5. Aggregate functions
  6. Multiple tables
  7. Subqueries
  8. Users, privileges, and diagnostics
  9. Views
  10. Triggers
  11. Stored procedures
  12. Stored functions
  13. Transactions
  14. Database access in Python and Java
  15. Database access in PHP
Other
  1. Introduction to databases
  2. Introduction to SQLite
  3. Introduction to PostgreSQL
  4. Introduction to Redis
  5. Introduction to Firebase