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

Local value reflection using TIMESTAMP data type extensions

To cover the complexity of time zone management, local timestamp reflection should also be highlighted. This section introduces data types forming the TIMESTAMP type extension. In principle, three TIMESTAMP data types are available:

  • TIMESTAMP does not cover time zone elements. It is mostly used for backward compatibility or values that do not need to reference time zones at all.
  • TIMESTAMP WITH TIME ZONE maps the time zone to the value by the offset extension. Using this data type, particular values can be time zone-shifted and coordinated across regions. Thus, it is normalized across the database.
  • TIMESTAMP WITH LOCAL TIME ZONE is a specific type that does not state the time zone explicitly. Instead, the transformation is applied directly. Thus, the original value of the hour and minute elements is recalculated and provided to the user depending on their time zone.

Let’s create a simple table...