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

Periods of time

The last section described date or time point value representation principles. Periods of time can be modeled by two time points, expressing the beginning and end points of the validity, represented in different ways, delimiting whether the time point is exclusive or inclusive. The second principle is associated with just one attribute, commonly pointing to the beginning point, followed by the time interval duration (period). There are several designations to represent particular values. The general format for the period is P[n]Y[n]M[n]DT[n]H[n]M[n]S, where [n] is replaced by the numerical value of the physical element. P, Y, M, D, T, H, M, and S are the delimiters for individual element reflection, signifying the following:

  • P expresses the period:
    • Y: Number of years
    • M: Number of months
    • D: Number of days
  • T refers to the time components:
    • H: The hour value
    • M: The minute value
    • S: The second value

As stated, a common representation of periods is formed by the...