Thank you very much for the response! I am exploring on the website and Ive noticed a few versions of oracle I can download (11g, 10g, 9g). Which would be most beneficial from an educational standpoint? Do all businesses that use oracle always upgrade to the latest version?

Ive seen the terms PL/SQL a lot when researching oracle. Is this something that I will learn eventually by using oracle, or would it be best to specifically learn SQL or PL/SQL?