November 2009
Intermediate to advanced
576 pages
12h 25m
English
Content preview from Oracle SQL Recipes: A Problem-Solution ApproachBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 6. Working with Date and Time Values
This chapter deals with recipes for date, time, and related temporal datatypes. Queries involving dates and times are very common in almost all databases. Working with dates and times is also very strange when compared to other forms of data, due to the long history (pardon the pun) of how our concepts of dates, hours, minutes, seconds, days, months and years came about. For instance, our division of minutes into 60 seconds, hours into sixty minutes, and days into two 12-hour blocks is derived from ancient Sumerian and Babylonian tradition. And they got the notion of a base-12 for counting hours and other things by using the segments of the four fingers (not the thumb) of one hand.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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