June 2015
Intermediate to advanced
1800 pages
70h 6m
English
book
Microsoft SQL Server 2014 Unleashed
by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
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Queries Using Columnstore Indexes
xVelocity columnstore indexes, first introduced in SQL Server 2012, group and store data for each column in the table and then join all the columns to complete the whole index. This type of index differs from traditional indexes, which group and store data for each row of data and then join all the rows to complete the whole index. For certain types of queries, such as data warehousing types of queries that access large amounts of data, the SQL Server query processor can take advantage of the columnstore index to significantly improve query execution times.
When the optimizer identifies a columnstore index and generates a query plan that makes use of the columnstore index, you’ll see the Columnstore Index Scan ...
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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.