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2. Codecademy - Wikipedia

   en.wikipedia.org/wiki/Codecademy

   Codecademy. Codecademy is an American online interactive platform that offers free coding classes in 12 different programming languages including Python, Java, Go, JavaScript, Ruby, SQL, C++, C#, and Swift, as well as markup languages HTML and CSS. [3] [4] The site also offers a paid "Pro" option that gives users access to personalized learning ...

3. How to learn SQL: These are the best online courses

   www.aol.com/learn-sql-best-online-courses...

   SQL is used to communicate with databases. In fact, it's probably the language you should learn even if coding seemingly has nothing to do with your career. How to learn SQL: These are the best ...

4. SQL - Wikipedia

   en.wikipedia.org/wiki/SQL

   History. SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd in the early 1970s. This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...

5. CS50 - Wikipedia

   en.wikipedia.org/wiki/CS50

   The course material is available online for free on the edX platform, with a range of certificates available for a fee. As of 2022, [update] this online version, called CS50x, teaches the languages C , Python , SQL , HTML , CSS , and JavaScript .

6. 10 Free Online Certification Courses to Advance Your Career - AOL

   www.aol.com/news/10-free-online-certification...

   Certificate programs can lead to high-paying jobs -- so if you don't have to pay for a certification, it's a real opportunity. 10 Free Online Certification Courses to Advance Your Career Skip to ...

7. 10 Free Online Certification Courses to Advance Your Career - AOL

   www.aol.com/news/10-free-online-certification...

   Finding free ways to obtain training and certifications should be at the top of your list. 10 Free Online Certification Courses to Advance Your Career Skip to main content