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Author: Brent Ozar

I make Microsoft SQL Server go faster. I love teaching, travel, cars, and laughing. I'm based out of Las Vegas. He/him.

Updated First Responder Kit and Consultant Toolkit for April 2026

If there was ever a release you should skip for reliability reasons, it's this one. There's a lot of AI-edited code in here. I'm really only putting it out there because I want to let early adopters start playing around with a few new things: sp_BlitzIndex adds an @AI parameter to get index consolidation advice…

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Announcing More Improvements to PasteThePlan.com

Need to share an execution plan, like on forums or on Stack Overflow, and you wanna get their advice as quickly as possible? Paste the XML into PasteThePlan.com and you get a link that you can share to anyone with your plan's details.

The user interface is now cleaner, with separate tabs for query plan, query text, AI suggestions, raw XML, and your recent plans:

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How Multi-Column Statistics Work

The short answer: in the real world, only the first column works. When SQL Server needs data about the second column, it builds its own stats on that column instead (assuming they don't already exist), and uses those two statistics together - but they're not really correlated.

For the longer answer, let's take a large version of the Stack Overflow database, create a two-column index on the Users table, and then view the resulting statistics:

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[Video] Office Hours: Q&A on the Mountaintop

Well, maybe mountain is a bit of a strong word, but it's one of the highest elevation home sites in Las Vegas, with beautiful views over the valley, the Strip, the airport, and the surrounding mountains. Let's go through your top-voted questions from https://pollgab.com/room/brento while taking in the view - and you can move the camera around, since this is an Insta360 video.

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My Wish List for SQL Server Performance Features

There are a lot of shopping days left before Christmas, and even more before the next version of SQL Server ships, so might as well get my wish list over to Santa now so the elves can start working on ignoring them.

My work focuses on performance tuning, so that's what my wish list focuses on, too. They really are wishes, like I-want-a-pony, because I know I'm discussing some stuff that's easy to describe, but really challenging to implement.

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SSMS v22.4.1: Copilot is GA. So What’s It Do Right Now?

Copilot in SSMS has two parts. Usually people focus on the pop-out Copilot chat window, and that's useful for sure, but honestly I think you're going to get way more mileage out of the code completions feature, right away, because it blends in with your existing workflows. Let's say that I'm working with the Stack…

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Updated First Responder Kit and Consultant Toolkit for March 2026

For the last few years, I've slowed the First Responder Kit release down to once per quarter. It felt pretty feature-complete, and I didn't want to make y'all upgrade any more than you have to. You're busy, and I don't want to take up your time unless there's something really big to gain from doing an upgrade.

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Get Free AI Query Advice in PasteThePlan.

At PasteThePlan.com, you can paste execution plans into your browser, then send a link to someone else to get query advice. It's useful for online forums, Stack Exchange, and the like.

After you paste the plan, you've got a new AI Suggestions tab. It sends your query plan (and my custom prompt) up to ChatGPT 5.3, and in 30 seconds or less, you get a second opinion on ways to make it go faster:

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Performance Tuning

Row-Level Security Can Slow Down Queries. Index For It.

The official Azure SQL Dev's Corner blog recently wrote about how to enable soft deletes in Azure SQL using row-level security, and it's a nice, clean, short tutorial. I like posts like that because the feature is pretty cool and accomplishes a real business goal. It's always tough deciding where to draw the line on how much to include in a blog post, so I forgive them for not including one vital caveat with this feature.

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