Event Tracing for Windows Target
There are many useful targets within SQL Server's Extended Events. Of all of the targets, the most daunting is probably the Event Tracing for Windows (ETW) target. The ETW...
2019-01-03
19 reads
Event Tracing for Windows Target
There are many useful targets within SQL Server’s Extended Events. Of all of the targets, the most daunting is probably...
2019-01-03
1,376 reads
Let’s talk SQL Server Waits: Topic 1 – SOS_SCHEDULER_YIELD
Over the next few weeks we will be reviewing some of the common SQL Server Waits. We will explain what...
2019-01-03
1,583 reads
Speaking at DataGrillen 2019
I’m delighted to announce I’m selected to speak at the 2019 edition of SQLGrillen DataGrillen. This is a German conference with the catchy tagline “Data, beer und Bratwurst”. I...
2019-01-03
19 reads
SQL Server Removing Duplicates
I know, I know your data could never possibly have duplicates because obviously, you have all the constraints in place...
2019-01-09 (first published: 2019-01-03)
2,998 reads
Do 75% of data breaches really come from “insiders”?
There’s a lot of information out there on data breaches. I’ve written before about one source that I trust — the Verizon Data Breach Report (DBIR). The 2018 DBIR...
2019-01-02
25 reads
AzCopy finally gets a sync option, and all the world rejoices
I consider Blob Storage to be the gateway drug to Azure, because it’s a really easy way to get going...
2019-01-02
254 reads
Make sure your nonclustered indexes are enabled
I know this post might sound obvious. This is a very rare problem. But this actually happened to me, and...
2019-01-02
55 reads
Versions and Patches in SQL Monitor
SQL Monitor has grown from a basic alerting system to an amazing product over the years. From it’s early days...
2019-01-02
293 reads
SQL Homework – January 2019 – Baselines
Happy New Year! Every year for New Years we all make a big deal of coming up with New Years...
2019-01-02
1,077 reads
Blogs
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...
Au Revoir for now
By Steve Jones
No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...
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