SQL stands for “Structured Query Language” and is used to manage and manipulate relational databases. Knowledge of SQL is imperative for working with large databases.
SQL Essential Learning available from Linkedin Learning. Approximately 3 hours of video tutorials – watch for free using your JMU eID
The Structured Query Language (SQL) at Coursera
Skills to Learn to become a Data Scientist from Dan Blevins, JMU Econ ’17, Lots of good stuff on SQL and Python
PostgreSQL complete tutorial