When comparing SQLZoo vs Udacity, the Slant community recommends Udacity for most people. In the question“What are the best websites to learn to code?” Udacity is ranked 5th while SQLZoo is ranked 38th.
Ranked in these QuestionsQuestion Ranking
Pro Embedded editors
Each tutorial page has multiple practice questions which include an editor for you to type your code and see the result.
Pro Really in-depth
SQLZoo offers very detailed tutorials on SQL that include program examples.
Pro Courses taught by industry professionals
Pro All courses are self-paced
Courses are always made available which means there is no waiting for the specific course you want to run. You can work through the courses as fast or as slow as you want.
Pro Offers Nanodegrees
Udacity offers a few different Nanodegrees which provide access to various different courses, project reviews and coaching support for $200/month.
Current options include Front End Web Developer, Data Analyst and Android Developer. See the full list here.
Pro Courses are easy to understand
Pro Actual feedback on coding projects
You get actual feedback from developers on your code, which is useful. Yes having your sites/apps do what it is supposed to do is important, but you need feedback to learn industry standards/best practices and other gotchas that are much harder to learn on your own.
Con Lack of community
SQLZoo does not have a forum or any aids for assisting with quizzes (such as hints).
Con Nanodegrees are expensive
Udacity is quite expensive at $200/month if you want to do a nanodegree.