Extended Events and Performance Tuning Knowledge
I’m working on updating my book, Query Performance Tuning Distilled, so that it reflects the new things available in SQL...
2011-10-05
1,823 reads
The Scary DBA
Networking
No, I’m not talking about hubs and switches. I’m talking about people. Networking is a major component of an event...
2011-10-03
1,154 reads
SQL In The City: LA
Just a reminder that there are a few seats left for SQL In The City: LA on the 29th of...
2011-09-30
1,523 reads
Book Review: Smarter, Faster, Cheaper
In my continuing quest to not get personal visits from Buck Woody (blog|twitter) I’m making sure that I make good...
2011-09-26
1,486 reads
SQL Server Execution Plans
I writequitefrequently about SQL ServerExecution Plans. I started in that area just because that’s how you figure out what a...
2011-09-22
834 reads
MicroTraining: Performance Tuning Checklist
I’ve been playing a lot with Google+ and the Hangouts there. I love them. I think they’re opening up a...
2011-09-21
1,015 reads
Statistics in Execution Plans
I was presenting on execution plans when another question came up that I didn’t know the answer to immediately. Yes,...
2011-09-20
1,356 reads
St. Louis SQL Server Users Group Feedback
You know I share what feedback I get from conferences. I don’t usually get feedback from users groups (well, I...
2011-09-16
865 reads
Probe Residual on Hash Match
I have to say, I only recently noticed this on a tool tip:
and this in the property sheet:
The bad news...
2011-09-15
1,695 reads
Meme Monday: Favorite PASS Memory
Have to complete my assignment from the Rockstar this month since I’ve missed the last several (he gets all weepy,...
2011-09-06
608 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