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

Summary

Until now, you may have felt that the world of time management was simple. A day has 24 hours, and a year consists of 365 days. In this chapter, we have shown that there is 1 day of the year that has only 23 hours and one that has 25 hours because of the transition to summer and winter time, described as DST. Similarly, although a standard year is made up of 365 days, there is also a leap year in which there is 1 extra day. The difference between the Julian and Gregorian calendars and the related leap year occurrence was also discussed.

Time zones are an integral part of the calendar and time. In the past, information systems were only local – server and client time were always the same. The client and server were in the same time zone within one small geographical area. With the globalization of systems, markets, and businesses, it is necessary to pay attention to time zones and transitions between them. We have described the concept of UTC, which is used for time...