Enhance the capabilities of SQL as PL/SQL allows mixing of SQL statements with   
   procedural constructs. Unlike SQL, PL/SQL is a programming language extending   
   SQL, which includes procedural elements like loops, data types, control   
   structures and others.    
   You can create program blocks, functions, methods, triggers and packages with   
   this extension. In simple terms, while SQL tells the relational database what   
   to do, PL/SQL tells them how to do.   
      
   The main sections on language PL/SQL are:   
   1. DML Statements   
   2. Select Query   
   3. Table Joins   
   4. Stored Procedures   
   5. Functions   
   6. Collections and Records   
   7. Cursors   
   8. Exception Handling   
   9. Triggers   
   10. Views   
   11. Error Messages   
      
   Start learning Oracle PL/SQL from basics to advance levels here...   
   https://goo.gl/KMSUDC   
      
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