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

This chapter dealt with Flashback technology. While it wasn't intended to cover temporality and monitor object states over time, it offered techniques to get the state at a defined point in the past. The Flashback operation can be done for the whole database or even a particular table, or the historical data image can be obtained by the query itself. The Select statement provides the most powerful solution from a temporal management point of view because the stored data is not changed – just the transaction logs are applied to construct the result set. As stated, the Flashback execution is based on Online and Archive transaction logs, by which the historical state is reconstructed. The availability of the logs is crucial for the activity and reliability of the solution. Regarding performance, Flashback commonly provides a more powerful solution compared to restore and recovery. On the other hand, a precise temporal model can ensure significant performance benefits...