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I have learnt SQL from https://sqlzoo.net https://sqlzoo.net It's a really good site with options of other database system syntax also.

• MegaLeon 12y ago
  Returns a "webpage not available" for me. However, if I access it from http://sqlzoo.net/wiki/Main_Page http://sqlzoo.net/wiki/Main_Page it seems fine.
• AlisdairO 12y ago
  This is a self-plug, but you might find http://pgexercises.com http://pgexercises.com useful as well.
  • avinassh 12y ago
    Hey your exercises are really good. I am half way through it and so far I am enjoying it a lot.
    • AlisdairO 12y ago
      fab - I'm really glad you like it!
• hobs 12y ago
  As someone who uses a LOT of SQL, and who has taught people before, I like this as a start, but it definitely needs more visualzation, and I recommend how sqlzoo represents tables in the top right with an overlay, its a simple and clear break down. Something like http://blog.codinghorror.com/a-visual-explanation-of-sql-joins/ http://blog.codinghorror.com/a-visual-explanation-of-sql-joi... may help with additional explanations. I also think that things like sargability need to be discussed early on because while sql/set based stuff can be odd to grok at first, knowing why you are doing the things you do is important in laying the right foundations.