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Query Optimizer Phases

The SQL Server Query Optimizer uses cost-based optimization to create an execution plan with the least cost.


Summer Tour 2021

Before the pandemic I had planned and scheduled a summer tour to hit the last remaining State (Louisianna) on my list of continental states to visit and several landmarks I had yet to see. Well, after an 18-month delay to the plan, I finally set off on an adventure. Starting…


Azure Data Engineer

John Deardurff passed the DP-200 and DP-201 exam for the Microsoft Certified: Azure Data Engineer certification.



Accessibility in Action

Earners of the Accessibility in Action digital badge have demonstrated their knowledge and skills in creating an inclusive culture.


Teaching in San Francisco

This isn’t my first time in California, but the first time outside the airport. I got to spend the first week of December 2019 in San Francisco teaching a SQL Server Performance Tuning and Optimization course. This is quickly becoming my favorite workshop to teach. What makes this class unusual…


MCT DAY and PASS Summit

What an amazing two weeks that started in Orlando for MCT Day the Saturday before Microsoft Ignite, then a quick trip to Seattle for the PASS Summit, and then finally to Kansas City to teach a dedicated SQL Performance Tuning and Optimization workshop. MCT Day: As you can see above,…


How I spent my Summer Vacation 2019

I just realized that I have not written a blog post since the beginning of May. Instead of backfilling let’s just start again here towards the end of September. First, the big news. After 17 years as a Senior Technical Instructor for New Horizons, I made the decision to make…