Objectives

• After completing this lesson, you should be able to do the following:

• Describe the characteristics of an ADF BC view object
• Create ADF BC view objects that can be used for data queries in a Web application
• Modify SQL statements in view objects
• Explain how entity objects relate to database tables
• Describe the persistence mechanism of entity objects
• Create entity objects from database tables
• Create associations between entity objects
• Create updatable view objects based on entity objects
• Link view objects to one another
• Refactor business components

Notes:

Lesson Aim

This lesson teaches you how to enable Web applications to query, insert, update, or delete data in the database. You learn how to use ADF BC read-only view objects to provide a reusable mechanism for defining database queries. The entity object is the ADF BC mechanism for persisting data. You create entity objects from selected tables in the database schema and then create updatable view objects based on them.