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  • Book Overview & Buying Oracle APEX Best Practices
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Oracle APEX Best Practices

Oracle APEX Best Practices

4.3 (6)
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Oracle APEX Best Practices

Oracle APEX Best Practices

4.3 (6)
Buy this Book

Overview of this book

Have you ever wanted to create real-world database applications? In this book you're not only getting APEX best practices, but will also take into account the total environment of an APEX application and benefit from it."Oracle APEX Best Practices" will guide you through the development of real-world applications. It will give you a broader view of APEX. The various aspects include setting up APEX environment, testing and debugging, security, and getting the best out of SQL and PL/SQL.In six distinct chapters you will learn about different features of Oracle APEX as well as SQL and PL/SQL.Do you maximize the capabilities of Oracle APEX? Do you use all the power that SQL and PL/SQL have to offer? Do you want to learn how to build a secure, fully functional application? Then this is the book you'll need. "Oracle APEX: Best Practices" is where practical development begins!
Table of Contents (14 chapters)
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Oracle APEX Best Practices
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Oracle APEX Best Practices
Credits
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Credits
About the Authors
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About the Authors
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Prepare and Build
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Prepare and Build
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History and background
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Installing APEX
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Choosing a web server
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Creating a second administrator
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Database
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Creating a workspace
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User Interface Defaults
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Page Zero
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Structure of multiple applications
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Creating applications
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Summary
2
Leveraging the Database
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Leveraging the Database
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Instrumentation
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Efficient lookup tables
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Analytic functions
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Aggregate functions
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Searching the contents of documents
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Summary
3
Printing
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Printing
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Printing architecture
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Installation and configuration of the Apache FOP report server
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How to debug or troubleshoot printing issues
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How to check if network services are enabled
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Creating a report with BI Publisher
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How to create a report that can deliver output in different formats
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How to add a chart to a report
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How to add dynamic images to a report
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Print API
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How to bypass the 32K limit
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Alternatives to use for PDF printing
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Plugins
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Summary
4
Security
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Security
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Securing Oracle Application Express for administrators
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Virtual Private Database
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Security considerations when installing Oracle Application Express
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Security considerations for the developer
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Summary
5
Debugging and Troubleshooting
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Debugging and Troubleshooting
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Debugging an APEX page
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APEX_APPLICATION.G_DEBUG
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APEX and Oracle SQL Developer
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Remote debugging
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JavaScript console wrapper
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Web development tools
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Summary
6
Deploy and Maintain
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Deploy and Maintain
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Package your application, or not?
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Deploying the database packages
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Deploying the APEX application
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Being active and proactive
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Summary
1
Database Cloud Service and APEX 4.2
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Database Cloud Service and APEX 4.2
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Oracle Public Cloud
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Summary
2
Index
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Index

Aggregate functions

Creating multilevel totals with aggregate functions might not be the first thing you think about. This has been a capability of the aggregate functionality for quite some time.

The purpose of the GROUP BY clause is to group rows together, based on the columns specified. But with aggregates, you don't always need to specify columns. When you want a grand total, you can omit the GROUP BY clause altogether:

SQL> select sum (sal)
  2    from emp
  3  /

  SUM(SAL)
----------
     29025

Omitting the GROUP BY clause leads to a grand total, but you can also use an empty set in the GROUP BY clause:

SQL> select sum (sal)
  2    from emp
  3   group by ()
  4  /

  SUM(SAL)
----------
     29025

On line 3 the empty set is used, denoted by the opening and closing braces ().

There is a lot more about aggregates, such as GROUPING SETS, ROLLUP, and CUBE.

Grouping sets

In the preceding example, we created a grand total by using an empty set in the GROUP BY clause. The GROUPING SETS clause...

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Oracle APEX Best Practices
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