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

Questions

Answer the following questions to test your knowledge of this chapter:

  1. Try to figure out the SQL injection risk in your already-developed applications. Have you focused on the implicit Date and Time conversions? How can your solution be updated to eliminate it?
  2. Use the data model shown in Figure 14.1. Assume that the following query is used to produce the name and surname values of the employee. Each employee is uniquely identified by the employee_id attribute value. The required value of the employee_id value is user specified:
    select name, surname
     from personal_data
          join employment using (personal_id)
       where employee_id=INPUT_VAL;

Which input value provides SQL injection and produces all the names and surnames, irrespective of the provided employee ID?

  1. NULL
  2. IS NULL
  3. 1=1
  4. 1 or 1=1