Learning SQL opens up career opportunities because it’s used by the most common relational database management systems, including Oracle, Sybase, Microsoft SQL Server, Access, and Ingres.

SoloLearn is a one-stop-shop irrespective of whether you’re just learning code or want to brush your skills. The app offers courses in a host of languages, including R, Python, SQL, C++, and Java.

Much of the world's data lives in databases. SQL (or Structured Query Language) is a powerful programming language that is used for communicating with and extracting various data types from databases.