  |
Wikipedia: PL/SQL - http://en.wikipedia.org/wiki/PL/SQL
Encyclopedia article about the Oracle extension to SQL, including an overview of its functionality, data types, and constructs. |
  |
Oracle Technology Network: PL/SQL - http://www.oracle.com/technology//tech/pl_sql/
Official product documentation, white papers, technical briefs, feature lists. |
  |
UC Davis - Tutorials - http://sirius.cs.ucdavis.edu/teaching/sqltutorial/
Oracle SQL and PL/SQL tutorials from the UC Davis Database and Information Systems Group (DBIS) |
  |
Message board on orafaq.net - http://www.orafaq.com/forum/
Unmoderated questions and answers. |
  |
BNF Index of PL/SQL Version 2.1 for Oracle 7 - http://cui.unige.ch/db-research/Enseignement/analyseinfo/PLSQL21/BNFindex.html
Backus-Naur Notation for PL/SQL 2.1 for Oracle 7. Old version, but still interesting. |