Database tables designing tool: before you can start coding up a new app, you must consider its basic data relationships.
SQLtutor, a learn-by-doing tutorial giving you lots of practice making different kinds of raw SQL queries.
- MySQL cheatsheet
- SQL course
- SQL via the Ruby Bastard’s book
- SQLZoo tutorial
- Learn SQL the hard way, an awesome free online book
- SQLite tutorial from Zetcode
- Dev Bootcamp’s SQLtutor, an awesome learn-by-doing tutorial giving you lots of practice making different kinds of raw SQL queries.
- “SQL Tutorial for beginners”: a comprehensive tutorial to MySQL databases (and learning SQL query language generally).
Understanding SQL join concepts