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

  1. How do we get the client time zone? Which function can be used?
    1. The SESSIONTIMEZONE function of the STANDARD package
    2. The MYTIMEZONE function of the STANDARD package
    3. The UTC_SHIFT function of the STANDARD package
    4. The DBTIMEZONE function of the STANDARD package
  2. Choose the best option specifying the database time zone:
    1. TZH only
    2. TZH:TZM only
    3. Name representation only
    4. TZH:TZM and name representation
  3. What data type is used for the column of the following select statement?
    select FROM_TZ(cast(sysdate as TIMESTAMP), '5:00')
                   AT TIME ZONE 'Europe/Brussels'
      from dual;
    1. DATE
    2. TIMESTAMP
    3. TIMESTAMP WITH TIME ZONE
    4. TIMESTAMP WITH LOCAL TIME ZONE
  4. Which function takes three parameters – input timestamp values and the original and destination time zone to be calculated – applying the time shift for the input value?
    1. FROM_TZ
    2. NEW_TIME
    3. TIMESTAMP
    4. AT TIME ZONE
  5. Which...