When comparing SQLBolt 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 4th while SQLBolt is ranked 36th.
Ranked in these QuestionsQuestion Ranking
Pro Comprehensive material
The lessons and topics are comprehensive and cover the important details of using SQL.
Pro Interactive lessons
There are a series of interactive lessons to learn the basics of SQL, all from within your browser.
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 Very few intermediate topics
The tutorial is designed to give beginners an understanding of the basics of SQL. They have started introducing intermediate topics, but currently there is only 3 to choose from.
Con Nanodegrees are expensive
Udacity is quite expensive at $200/month if you want to do a nanodegree.