Book Image

Developing Robust Date and Time Oriented Applications in Oracle Cloud

By : Michal Kvet
Book Image

Developing Robust Date and Time Oriented Applications in Oracle Cloud

By: Michal Kvet

Overview of this book

Proper date and time management is critical for the development and reliability of Oracle Databases and cloud environments, which are among the most rapidly expanding technologies today. This knowledge can be applied to cloud technology, on premises, application development, and integration to emphasize regional settings, UTC coordination, or different time zones. This practical book focuses on code snippets and discusses the existing functionalities and limitations, along with covering data migration to the cloud by emphasizing the importance of proper date and time management. This book helps you understand the historical background and evolution of ANSI standards. You’ll get to grips with data types, constructor principles, and existing functionalities, and focus on the limitations of regional parameters and time zones, which help in expanding business to other parts of the world. You’ll also explore SQL injection threats, temporal database architecture, using Flashback Technology to reconstruct valid database images from the past, time zone management, and UTC synchronization across regions. By the end of this book, you’ll be able to create and manage temporal systems, prevent SQL injection attacks, use existing functionalities and define your own robust solutions for date management, and apply time zone and region rules.
Table of Contents (26 chapters)
1
Part 1: Discovering Oracle Cloud
4
Part 2: Understanding the Roots of Date and Time
7
Part 3: Modeling, Storing, and Managing Date and Time
12
Part 4: Modeling Validity Intervals
17
Part 5: Building Robust and Secure Temporal Solutions
20
Part 6: Expanding a Business Worldwide Using Oracle Cloud

Modeling unlimited validity

The reliability and security of the entire time-delimited system directly depend on the accuracy and quality of the data stored in it. The main emphasis is placed on the accuracy of individual values, undefined states, incorrect states, and validity limits.

As already mentioned, the validity of an object’s state is mostly modeled using a logical and physical time interval definition. The implemented solution contains two timeline values expressing the beginning and end of the validity concerning the interval representation. The start of the validity is commonly precisely specified. Therefore, it is necessary to know exactly when the validity of the new state begins. The end point of the validity can be more complicated. If a synchronization layer is present in the system and the data is modified with precisely defined time periodicity, the validity of each state can be clearly defined. However, the problem occurs when the data change is asynchronous...