posted 09/11/2017 10:29
All oracle documentation is located on the following website:
Oracle Help Center
The "Database" section (Oracle Database Help Center) is where you'll find stuff on SQL and PL/SQL. Pick your database version and click on the "All Oracle Database Books" link at the bottom of the page to get to all the documentation. From there you can pick certain books, or you can search for what you want.
New to Oracle SQL and PL/SQL?, which Documentation to read first?
Start with the "Concepts" manual.
Then perhaps: "2 Day Developers Guide" "PL/SQL Language Reference" (and "PL/SQL Packages and Types Reference") "SQL Language Reference"