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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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Chapter 12 – Building Month Calendars Using SQL and PL/SQL

  1. B is correct. It is necessary to remove all elements lower than the month itself. This can be done with a truncating operation. Values can be rounded up. The first_day function does not exist and should be user defined. And finally, the EXTRACT function gets only one element, not the DATE value.
  2. C is correct. First, increase the original value (sysdate) by one month, then truncate its value. Finally, one day is subtracted, providing midnight of the last day of the month. The last_day function keeps the original time elements. TRUNC(sysdate) + 1 adds one day and removes time elements. The ROUND function cannot provide these results.
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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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