Extended Events: Avoid the XML
One story I hear over and over goes like this: I tried setting up Extended Events, but then I saw the output was XML so I stopped. Look, I...
2021-04-08 (first published: 2021-03-29)
375 reads
The Scary DBA
Query Store as an Upgrade Tool
There are a lot of uses for Query Store, but one of the most interesting is as an upgrade tool. We all know that upgrades in SQL Server can...
2021-03-29 (first published: 2021-03-22)
323 reads
Apologies
Hello all! I wanted to apologize to you. I haven’t been keeping up with the blog well at all over the last couple of months. I have simply been...
2021-03-15
33 reads
Learning A Little Oracle
As part of my job, I’ve been tasked with doing some of my work in Oracle, so I’m learning Oracle. Allow me to share a little of my pain...
2021-02-19 (first published: 2021-02-15)
340 reads
SELECT * Hurts Performance, Badly
Quite a few years ago, I wrote a post about SELECT * and performance. That post had a bit of a click-bait title (freely admitted). I wrote the post...
2021-02-01 (first published: 2021-01-25)
701 reads
Getting Started Reading Execution Plans: Highest Cost Operator
Reading execution plans in SQL Server is just hard. There’s a lot to learn and understand. I previously outlined the basics I use to get started when I’m looking...
2020-12-22 (first published: 2020-12-14)
671 reads
Why Aren’t You Automating Database Deployments?
Building out processes and mechanisms for automated code deployments and testing can be quite a lot of work and isn’t easy. Now, try the same thing with data, and...
2020-12-03 (first published: 2020-11-23)
529 reads
The Learning Curve for DevOps
If you’re attempting to implement automation in and around your deployments, you’re going to find there is quite a steep learning curve for DevOps and DevOps-style implementations. Since adopting...
2020-11-25 (first published: 2020-11-16)
277 reads
Database Fundamentals #29: Create Foreign Keys With Table Designer
The purpose of a foreign key is to ensure data integrity by making sure that data added to a child table actually exists in the parent table and preventing...
2020-11-09 (first published: 2020-11-02)
271 reads
Most Costly Statement in a Stored Procedure
A lot of stored procedures have multiple statements and determining the most costly statement in a given proc is a very common task. After all, you want to focus...
2020-10-19 (first published: 2020-10-12)
898 reads
Blogs
How to Clear the SSMS Cache (SSMS 21 and Later)
By SQLPals
How to Clear the SSMS Cache (SSMS 21 and Later) Updated...
The flight recorder: Replaying what an AI agent did on my SQL Server
By Arun Sirpal
“What exactly did it do on my server?” is the first question a DBA...
Announcements from the Microsoft Fabric Community Conference — Barcelona 2026
By James Serra
Microsoft shared a broad set of Fabric, Power BI, and SQL updates at FabCon...
Forums
Let's Talk Certifications
Comments posted to this topic are about the item Let's Talk Certifications
The Hidden Security Risks of Role Combination in SSAS Tabular
Comments posted to this topic are about the item The Hidden Security Risks of...
The Empty Aggregate
Comments posted to this topic are about the item The Empty Aggregate
Question of the Day
The Empty Aggregate
I have this table in a SQL Server 2025 database:
CREATE TABLE [dbo].[CustomerOrder] ( [OrderID] [int] NULL, [CustomerID] [int] NULL, [total] [money] NULL ) ON [PRIMARY] GOWhat is returned from this code? (answers are for the sum and then the count)
SELECT SUM(total) AS sum,
COUNT(total) AS count
FROM dbo.CustomerOrder;
See possible answers