March 2018
Intermediate to advanced
816 pages
19h 35m
English
Content preview from SQL Server 2017 Developer???s Guide
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Regressed queries
The Regressed queries report page shows queries with regressed performance over time. Query Store analyzes database workload and extracts the 25 most regressed queries according to the chosen metrics. You can choose between the following metrics: CPU time, Duration, Logical reads, Logical writes, Physical reads, Memory consumption, CLR time, DOP, and Row Count. You can also decide whether you want to see total numbers or maybe average, max, min, or standard deviation of the value chosen in the first step. The following screenshot shows regressed queries in a moderate database in a chart format:
View regressed queries in a ...
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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.