Kevin3NF

Kevin Hill is a career SQL Server DBA living in Dallas, TX. His specialities include HA/DR, Best Practice configuration, Performance tuning and teaching new and accidental DBAs
  • Interests: Cycling, family, sci-fi, DBA stuff

Blog Post

SQL Server Wait Stats

Everything in SQL Server is waiting for something…this is by design. And most people never think about it… Until your application is waiting to complete its request, sell the...

2025-04-30 (first published: )

414 reads

Blog Post

The Cost of Not Having a DBA

Does skipping a DBA save money? Wait until your system grinds to a halt, your backups fail, or your cloud bill skyrockets. The “DBA? We Don’t Need No Stinkin’...

2025-04-14 (first published: )

607 reads

Blog Post

SQL Server Time Bombs

Common Reasons for Emergency SQL calls If you are a production DBA (or Accidental prod DBA) you’ve gotten that frantic call in the middle of the night. Or maybe...

2025-03-12 (first published: )

570 reads

Blogs

Announcements from the Microsoft Fabric Community Conference — Barcelona 2026

By

Microsoft shared a broad set of Fabric, Power BI, and SQL updates at FabCon...

Au Revoir for now

By

No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...

Goodbye, Microsoft

By

A few years ago I took a new job at Microsoft, working as a...

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Forums

Let's Talk Certifications

By Grant Fritchey

Comments posted to this topic are about the item Let's Talk Certifications, which is...

The Hidden Security Risks of Role Combination in SSAS Tabular

By Pablo Echeverria

Comments posted to this topic are about the item The Hidden Security Risks of...

The Empty Aggregate

By Steve Jones - SSC Editor

Comments posted to this topic are about the item The Empty Aggregate

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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]
GO
What 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