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

Time zone perspective

Oracle cloud database instances use UTC date and time references by default. Although it is strongly recommended to use UTC to simplify time zone management, shifts, and calculations and avoid data conversions, users can change the base time zone reference in the cloud console or by using APIs.

The standard usage of UTC arises from ISO 8601, which covers time zone management by using the values offset from UTC for local values.

When dealing with a complex system accessed across regions and multiple time zones, the server and client perspectives will inevitably need to be distinguished. The server, like the client, can be located anywhere in the world. However, the locations themselves are important for the correct determination of time zones and transformations between them. Thanks to that, it is possible to obtain and process time from the client’s point of view, as well as the server’s. Consequently, all values are linked to the time zone...