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You're reading from  Developing Robust Date and Time Oriented Applications in Oracle Cloud

Product typeBook
Published inMay 2023
PublisherPackt
ISBN-139781804611869
Edition1st Edition
Tools
Oracle Database
Concepts
Databases
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Author (1)
Michal Kvet
Michal Kvet
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Michal Kvet

Michal Kvet is a researcher, educator, and database expert at the University of Žilina in Slovakia. His primary focus areas are databases, analytics, performance, and cloud computing. He works closely with Oracle and Oracle Academy. He is the co-author of multiple textbooks (a SQL and PL/SQL cookbook, a book on APEX application development, a book on temporal databases, and a MySQL cookbook), coordinates multiple Erasmus+ projects and co-organizes several research conferences and database workshops. Besides this, he supervises engineering projects and bachelor's, master's, and doctoral theses. Over the years, his research has been associated with date and time management and temporal databases. He has Oracle's SQL, PL/SQL, Cloud, Analytics, and Administration certifications. His core knowledge of temporality is provided to you in this book.
Read more about Michal Kvet

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TIMESTAMP arithmetic

The TIMESTAMP data type and related arithmetic work differently from how it may seem at first glance. Let’s take the TIMESTAMP value and add 1 day, represented by adding the value 1 to the particular value. However, what about the output? Will it even work? The following statement provides you with the answer:

select localtimestamp, localtimestamp + 1 from dual;

In addition, the following table shows the results:

LOCALTIMESTAMP

LOCALTIMESTAMP + 1

13.06.22 07:08:49,847000000

14.06.2022 07:08:49

Table 5.4 – Timestamp arithmetic

Yes, it took the localtimestamp value and added 1 day. The result is, however, a bit strange, isn’t it? Namely, the second fractions are lost. What has happened? Well, particular addition and subtraction cannot be applied to the TIMESTAMP value. To prevent...

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Developing Robust Date and Time Oriented Applications in Oracle Cloud
Published in: May 2023Publisher: PacktISBN-13: 9781804611869
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Michal Kvet

Michal Kvet is a researcher, educator, and database expert at the University of Žilina in Slovakia. His primary focus areas are databases, analytics, performance, and cloud computing. He works closely with Oracle and Oracle Academy. He is the co-author of multiple textbooks (a SQL and PL/SQL cookbook, a book on APEX application development, a book on temporal databases, and a MySQL cookbook), coordinates multiple Erasmus+ projects and co-organizes several research conferences and database workshops. Besides this, he supervises engineering projects and bachelor's, master's, and doctoral theses. Over the years, his research has been associated with date and time management and temporal databases. He has Oracle's SQL, PL/SQL, Cloud, Analytics, and Administration certifications. His core knowledge of temporality is provided to you in this book.
Read more about Michal Kvet

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