GroupBy – Free SQL Server Training is free technical training by the community, for the community. Volunteer speakers submit abstracts at and you – the attendee – vote to pick the sessions. Want to present your own session or just vote on others? Join us at
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GroupBy – Free SQL Server Training


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Now displaying: May, 2017
May 30, 2017

It’s a work day, and you’re in front of your monitor battling a vicious query. You’ve already tuned a query or two in your life and have some tricks up your sleeve, but nothing seems to get this query down to a reasonable time and allow you to drink that cup of coffee you want so bad.

SQL Server 2016 adds a few impressive new features that might help you with that.

During the session, we will look at the different performance tuning aspects the new features enhance: Execution plan history and enforcement using the Query Store, live query execution visualization, DMV enhancements, new query hints, and more.

Join this session to see how SQL Server 2016 makes performance tuning easier and more efficient.

May 23, 2017

SQL Development is a broad subject with many roads to choose from. Often times SQL Developers feel overwhelmed and unsure which areas they need to focus on. The purpose of this session is to give a high-level overview and present paths for further study and growth. Subjects reviewed in this session will include coding patterns, error handling, and execution plans. Demonstrations of free tools will also help developers find ways of simplifying their daily tasks. Attendees will leave this session empowered with knowledge and directions for further growth.

May 16, 2017

Query Store in SQL Server 2016 is one of the most relevant improvements for production DBAs. It introduces the concept of click-once mitigation approach to query performance regression.

But that’s not the sum of all enhancements in the query performance analysis and troubleshooting space introduced in SQL Server recently.

In this session, we will learn about other enhancements that can help you troubleshoot query performance.

Ranging from new xEvents to Showplan improvements, from LQS (and underlying infrastructure) to the revised Plan Comparison tool, learn how these can help you streamline the process of troubleshooting query performance and gain faster insights.

May 9, 2017

Have you ever considered a situation where Columnstore Index can be quite the opposite of what one would expect from it? A slow, wasteful source of painfully slow queries, lagging the performance, consuming irresponsible amount of resources ...

Setting the wrong expectations (it won't run 100 times faster on EVERY query), selecting the wrong architecture (partition by 100s of rows instead of millions), using and aggregating by the large Strings in the fact tables - this list is actually quite large.

What about some of the less known limitations for building Columnstore Indexes? The ones that will bite you suddenly in the middle of the project - when you do not expect it at all?

Let me show you how to achieve those painful mistakes and you will surely know how to avoid them :)

May 2, 2017

With the release of SQL Server 2016, we were finally able to play with, in my opinion, one of the most exciting new features in SQL Server 2016, the Query Store!

The Query Store serves as a flight recorder for your query workload and provides valuable insights into the performance of your queries. It doesn’t stop there, however, using the performance metrics the Query Store records, we can decide which Execution Plan SQL Server should use when executing a specific query. If those two features aren’t enough, the Query Store provides all this information inside easy-to-use reports and Dynamic Management Views (DMVs) removing a great deal of the complexity of query performance analysis.

During this session, we will take a thorough look at the Query Store, its architecture, the performance impact of enabling the Query Store, DMVs, the built-in reporting and the custom Query Store Dashboard.

No matter if you are a DBA or developer, the Query Store has all the data you need to make your time analyzing query performance a whole lot more fun!