The Axis Of Evil
Views, table variables and local variables are great in terms of programming principles.
But In terms of performance, they can be...
2013-03-25 (first published: 2013-03-20)
2,816 reads
Matan Yungman
Do You Know sys.dm_exec_text_query_plan?
One of the most fundamental DMF’s a SQL Server DBA should know is sys.dm_exec_query_plan.
This Dynamic Management Function allows us to see...
2013-03-19 (first published: 2013-03-12)
2,816 reads
On Trends And Proportions
Assuming you’ve been on earth lately, you probably heard the terms “Big Data”, “Hadoop”, “NoSQL” and so on.
Companies want to...
2013-03-05
571 reads
SQL Server Videos
About two weeks ago, I wrote about SQL Server Podcasts and why I love that medium so much.
Today, I want...
2013-02-26
1,062 reads
Things You Can Find In The Plan Cache
Two weeks ago I delivered a presentation called “Things You Can Find In The Plan Cache” to the israeli SQL Server...
2013-02-18
497 reads
SQL Server Podcasts
Photo credit: Digitalnative
About a year ago, I came across an online deal for a car stereo system with a USB...
2013-02-14
1,581 reads
Querying Execution Plan XML For Inaccurate Row Count Estimates
I read this awesome post by Joe Sack, titled “Detecting Cardinality Estimate Issues with sys.dm_exec_query_stats”.
I was amazed by the beauty...
2013-01-31
1,889 reads
What Queries From The Application Do To Your Plan Cache
Usually, a database is meant to serve some kind of application, and .Net applications have a few possible ways to query...
2013-01-09
1,186 reads
Small Changes Can Make A World Of Difference
SQL Server 2012 is best known for its bombastic new features: AlwaysOn, Columnstore indexes, Window functions enhancements, Extended Events enhancements,...
2012-09-30
1,121 reads
What I Expect From 24 Hours Of Pass
24 Hours of Pass is tomorrow. If you haven’t registered yet, now is a good time.
I expect to:
Have little to no...
2012-09-19
533 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
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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