Introducing PL/SQL to SQL Users: Enhance Your SQL with PL/SQL Procedural Logic

Introducing PL/SQL to SQL Users is for SQL users who do not have PL/SQL skill. If you wish you can write some procedural logic in a SQL statement, such as controlling the process flow using IF THEN ELSE logic, you need to consider using PL/SQL. This book, which introduces PL/SQL basic features, is a perfect starting point.