Sometimes we cannot improve query performance because we don’t have control over the code. Consider a query that is generated by Entity Framework (EF) from the application and you do not have access to the source code. The main question is how you can improve SQL Server query optimization for a poorly performing query?
2026-01-05
This article covers the 10 key concepts developers should understand to avoid surprises and to use the model database intentionally.
2026-01-02
Just like advances in artificial intelligence, I have heard that quantum computing is going to be a disruptive technology for our future. For instance, there’s the concern that it’s going to break/crack a lot of network encryption and potentially data encryption. What’s going to be affected, how long do we have, and what do I (and my organization) need to do to prepare for it?
2025-12-31
Beneath the surface though, AI is just a tool that learns certain patterns and draws conclusions from information on the Web to answer questions, make decisions, or craft a code sample or two. Those that have used AI in the past will know that just as it’s capable of providing valuable information, AI tools can also generate inaccurate responses, and that’s why it’s important to use it wisely.
2025-12-29
I’ve used SQL window functions for years, but I’ve never fully understood framing. To truly master window functions, you need at least a basic grasp of framing and how to apply it to your queries. Framing is especially helpful when working with aggregate functions. How can you overcome this hesitation to try framing?
2025-12-26
You’re a developer responsible for maintaining a SQL Server database used to feed data to Power BI. You realize that some tables don’t have a modifiedDate column and some do. Also, you know the data is updated by the application as well as other processes which makes the modifiedDate unreliable. This is because it may not always be updated when data changes. You need a way to track data changes to ensure only changed rows are updated on reports in Power BI.
2025-12-24
First off, I understand if you read the headline and you have a knee-jerk reaction. I totally understand that there are a lot of people out there who hate AI, and believe me, I hate most uses of it. Lots of its advice can be misleading at best, and absolute garbage at worst.
2025-12-22
SQL Server 2025 includes new features and enhancements. In the previous SQL Server 2025 tips, we have explored many new features. Have you explored the new Product() function? If not, this will walk you through the Product() function with several examples.
2025-12-19
Securing SQL Server isn’t complicated, but it does require consistent attention to the areas where real risks arise, such as privileges, configuration, encryption, patching, and monitoring. This article outlines 15 practical, high-impact steps you can take to harden your SQL Server environment.
2025-12-17
In last week’s Query Exercise, I challenged you to play some code golf to generate big spills with tiny T-SQL.
2025-12-15
Slow-running queries can degrade your Redshift cluster’s performance and lead to increased costs. Identifying...
By gbargsley
If you've been here before, you know this blog is usually about SQL Server,...
I’ve been doing storage load tests for SQL Server for a long time, both...
Comments posted to this topic are about the item How Long is a Long...
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In SQL Server 2025, a long I/O is recorded in the error log with message 833. How long much an I/O request be outstanding before this message is written to the log?
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