As we have just mentioned bind variables, let's sharpen this issue. You should use bind variables in SQL and PL/SQL code to help improve performance and scalability of the Oracle database. Bind variables enable the Oracle database to cache and reuse identical SQL statements. The database checks if the query is already parsed in the shared pool, and if so, it can immediately execute the statement. Otherwise, it will need to perform a hard parse of the statement, which is CPU intensive and increases statement execution time.
Oracle Application Express 3.2 - The Essentials and More
Oracle Application Express 3.2 - The Essentials and More
Overview of this book
Developing data-centric web applications can be a real challenge as it is a multi-disciplinary process. There are many technologies involved in the client side (HTML, CSS, JavaScript, and so on); the interaction with the database, on the server side; the typeless nature of the web environment; and above all, the need to put it all together. This needs to be done in a manner that will allow the end users to do their job in the simplest and most efficient way, while enriching their user experience. How often have you wished that developing such applications could be uncomplicated and straightforward? This book will show you that it's possible, and teaches you how to do it, using Oracle Application Express (APEX).With this practical guide to APEX, you'll learn how to easily develop data-centric web applications for the Oracle environment. The book covers the development cycle of an APEX application, reviewing the major APEX principles and building blocks chapter by chapter. It starts with the basic skills you need to get going when developing with APEX. Later, you will learn advanced issues, such as how to build tailor-made forms and reports, using APEX APIs, AJAX, and so on. It not only deals with the "How" but also with the "Why", and before long you will be able to understand APEX concepts, and use them to expand and enhance the built-in features, wizards, and tools.The book starts with the design phase, including building the necessary database objects infrastructure; continues with ways to implement the application logic (on the server side) and the User Interface (on the client side), whilst showing you how to enhance your applications' features and functionality according to your specific needs; and it ends with application deployment.The book emphasizes and clearly documents areas such as Globalization, Localization, and developing multi-lingual applications, and includes a special discussion about Right-To-Left (RTL) support for APEX applications, documented here for the first time.Throughout the book, there are many screenshots and snippets of code, taken from working APEX applications. The book is accompanied by demo APEX applications that you can download and install in your APEX environment, thoroughly analyze, and learn from as you read the book.
Table of Contents (30 chapters)
Oracle Application Express 3.2
Credits
About the Authors
About the Reviewers
Preface
Free Chapter
An Introduction to APEX
What we need to know to effectively use APEX
APEX Basic Concepts
The Application Builder Basic Concepts and Building Blocks
APEX Items
APEX Buttons
APEX Computations
APEX Validations
APEX Processes
APEX Branches
APEX SQL Workshop
APEX Forms
APEX Reports
Tabular Forms
Calendars
Interactive Reports
AJAX with APEX
Globalization and Localization With APEX Applications
Right-To-Left Support in APEX
Deploying APEX Applications
The APEX Runtime Environment
Security
Application Conversion
APEX Best Practices
APEX Installation, Upgrade, and Configuration Tips
Customer Reviews