February 2003
Intermediate to advanced
352 pages
9h
English
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Date-Range Searching
An undocumented but powerful feature of Google’s search and API is the ability to search within a particular date range.
Before delving into the actual use of date-range searching, there are a few things you should understand. The first is this: a date-range search has nothing to do with the creation date of the content and everything to do with the indexing date of the content. If I create a page on March 8, 1999, and Google doesn’t get around to indexing it until May 22, 2002, for the purposes of a date-range search, the date in question is May 22, 2002.
The second thing is that Google can index pages several times, and
each time it does so the date on it changes. So
don’t count on a date-range search staying
consistent from day to day. The daterange:
timestamp
can change when a page is indexed more
than one time. Whether it does change depends on whether the content
of the page has changed.
Third, Google doesn’t “stand behind” the results of a search done using the date-range syntaxes. So if you get a weird result, you can’t complain to them. Google would rather you use the date-range options on their advanced search page, but that page allows you to restrict your options only to the last three months, six months, or year.
The daterange: Syntax
Why would you want to search by daterange:? There
are several reasons:
It narrows down your search results to fresher content. Google might find some obscure, out-of-the-way page and index it only once. Two years later ...
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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.
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.