You can significantly improve the performance of SQL queries with indexes. There may even be times when an index can supply all the information you need in a query. An index-organized table might be able to give you even greater performance benefits than an index alone.

In this module, you will learn how to:

1. Describe an index-organized table and explain when to use it
   
2. Create an index-organized table
   
3. Rebuild an index-organized table with the MOVE parameter of the ALTER TABLE command
   
4. Create a secondary index on index-organized table
   
5. Understand the differences between index-organized and regular tables

Although index-organized tables were introduced in Oracle8, Oracle8i includes significant enhancements to the capabilities of these database objects.
In the next lesson, we will discuss what an index-organized table is.