If you’re applying for a job in the field of data science, data engineering, or business analytics, there’s a good chance that you’ll have to work with SQL at one point or another. Knowing how to manage and query your own data is incredibly important in these fields. If you’re new to SQL, or need to brush off a rusty set of skills to address the current marketplace, it can be difficult to figure out what you need to know about SQL in order to be competitive in your field.
That being said, here are the basics:
