December 2015
Intermediate to advanced
762 pages
19h 13m
English
Content preview from XQuery, 2nd Edition
Become 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,
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.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.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 20. Working with Dates, Times, and Durations
XQuery provides advanced capabilities for querying, creating, and manipulating date-related values. There are twelve date-related types built into XQuery. They fall into three categories:
The date and time types, which represent a point in time—for example, a specific date or time
The duration types, which represent periods of time, such as a number of years or minutes
The date component types, which represent parts of dates, such as the year 2015, the month of May, or the 10th day of each month
This chapter explains the date-related types used in XQuery and the functions and operators that act on them.
The Date and Time Types
Four types represent specific dates and/or times: xs:date,
xs:time, xs:dateTime, and xs:dateTimeStamp. These XML Schema built-in types are based on the ISO 8601 standard. They are summarized in Table 20-1.
| Type name | Description | Format (without time zone) | Examples |
|---|---|---|---|
xs:date
| Date |
YYYY-MM-DD
|
2015-05-03
|
xs:time
| Time |
hh:mm:ss.sss
|
10:32:15
|
xs:dateTime
| Date and time with optional time zone |
YYYY-MM-DDThh:mm:ss.sss
| 2015-05-03T10:32:15, 2015-05-03T10:32:15.55 |
xs:dateTimeStamp
| Date and time with mandatory time zone |
YYYY-MM-DDThh:mm:ss.sss
|
2015-05-03T10:32:15-05:00, 2015-05-03T10:32:15.55Z
|
The xs:date type has year, month, and day components, while xs:time has hour, minute, and seconds components. The format of the xs:dateTime and xs:dateTimeStamp types is a concatenation of the
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.