SQL. From what I can tell it'll be around for a long while, and so many companies require skills in data extraction and analysis. Not to mention that most apps

SQL. From what I can tell it'll be around for a long while, and so many companies require skills in data extraction and analysis. Not to mention that most apps built with a front-end framework will usually interface with their database using an SQL-like language. Data underpins most of the value in tech; learn how to manipulate and analyse it with a language like SQL.