•Overview of the SQL Query Language •SQL Data Definition •Basic Query Structure of SQL Queries •Additional Basic Operations •Set Operations •Null Values. Chapter 1: Getting started with SQL; Chapter 2: ALTER TABLE; Chapter 3: AND & OR Operators; Chapter 4: Cascading Delete; Chapter 5: CASE; Chapter 6: Clean Code in SQL; Chapter 7: . SQL functions, query joins, and SQL subqueries (a query within a query). Many examples help you understand these important topics. These examples use Oracle7, Sybase