Both SQL and RegEx, programming languages, are going to be taught in my classes along side R. SQL and RegEx are used across a plethora of data analytics softwares from R and Python open source softwares to proprietary softwares, like SAS, and to business intelligent tools, like Tableau. Learning these universal programming languages can be very helpful.
SQL is a programming language for databases. It pulls data, can restructure data, and can filter data to a particular subset in your analytical software, like R.
RegEx is a programming language for strings (or also known as text fields), which could be complex to edit otherwise without knowing that language, and again, it’s used across many data analytics softwares, like R, where the language can be embedded.
In my training, I teach both SQL and RegEx plus the programming language R in R open source software!
Knowing these languages can make your life easier if having to work on or try different softwares. SQL and RegEx are so universal and helpful. It will really help you in your job pursuing a data analytics career.
Here’s a great SQL cheat sheet if want to start learning and trying yourself!
Here’s a great website that allows you to test RegEx programming language and the website explains the syntax too!
https://regexr.com/

You’ll become very advanced learning these two programming languages inside R as part of the prep work before doing your data analysis in R programming language.