Databases are incredibly prevalent -- they underlie technology used by most people every day if not every hour. Databases reside behind a huge number of websites; they're a crucial component of telecommunications systems, banking systems, video games, and just about any other software system or electronic device that maintains some amount of persistent information.
SQL is the long-accepted standard query language for relational database systems: it empowers employees and businesses to make smarter business decisions with the increasing amount of data they have. Professionals with understanding of how databases are structured and of the principles and application of SQL are in high demand; being able to access and analyze data using SQL is a foundational data science skill.
This program, offered by Stanford Online, is based on the popular on-campus course taught by CS Professor Jennifer Widom.