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
Content preview from Microsoft SQL Server 2014 UnleashedBecome 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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Evaluating SARG and Join Selectivity
To determine selectivity of a SARG, which helps in determining the most efficient query plan, the Cardinality Estimator uses the statistical information stored for the index or column, if any. If no statistics are available for a column or index, SQL Server will automatically create statistics on nonindexed columns specified in a SARG if the AUTO_CREATE_STATISTICS option is enabled for the database. SQL Server also automatically generates and updates the statistics for any indexed columns referenced in a SARG if the AUTO_UPDATE_STATISTICS option is enabled. In addition, you can explicitly create statistics for a column or set of columns in a table or an indexed view by using the CREATE STATISTICS command. ...
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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.