Query tuning: The IN clause
This post will cover the IN clause and another way to rewrite the same logic. I don’t intend to say...
2019-01-29
2,713 reads
Cardinality: Not Just For The Birds
Watch this week’s episode on YouTube.
When building indexes for your queries, the order of your index key columns matters. SQL...
2019-01-29
1,031 reads
Cardinality: Not Just For The Birds
Watch this week's video on YouTube
When building indexes for your queries, the order of your index key columns matters. SQL Server can make the most effective use of an...
2019-01-29
9 reads
Cardinality: Not Just For The Birds
Watch this week's video on YouTube
When building indexes for your queries, the order of your index key columns matters. SQL Server can make the most effective use of an...
2019-01-29
11 reads
Authentication considerations for your applications when migrating to Azure SQL Managed Instances
This blog post is related to my previous blog post on Azure SQL Managed Instances:
Azure SQL Managed Instance – full blown...
2019-01-29
357 reads
Azure SQL Managed Instance – full blown SQL Server in the cloud….?
This blog post is one that I have had percolating in the background since around November 2018.
My good mate John...
2019-01-29
1,182 reads
Research into Autism in Information Technology
Title: Exploring the experiences of employees on the autism spectrum working in information technology: an interpretative phenomenological analysis
My name is Sabrina Ellis, I am the Operations Director here at...
2019-01-29
45 reads
Research into Autism in Information Technology
Title: Exploring the experiences of employees on the autism spectrum working in information technology: an interpretative phenomenological analysis
My name is...
2019-01-29
202 reads
SSDT: Build in VSCode
Over the last couple of years I have been using VSCode more and more and Visual Studio less and less, this is great but there isn't first class support...
2019-01-29
15 reads
SSDT: Build in VSCode
Over the last couple of years I have been using VSCode more and more and Visual Studio less and less,...
2019-01-29
382 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