David Klee is all around geek who loves data - including the platform it resides on, virtualizing it, improving performance, availability, and disaster recoverability, and data presentation and visualization. He frequently advises organizations on the techniques of migrating their business-critical physical SQL Servers to the VMware infrastructure in his day job as Solutions Architect. David speaks at many national SQL Saturday events and SQL Server User Group meetings, as well as writes technical columns on SQL Server and virtualization topics on various blogs.

He is on Twitter (https://twitter.com/kleegeek), LinkedIn (http://www.linkedin.com/in/davidaklee), and blogs frequently (http://www.davidklee.net).

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Blogs

How to Clear the SSMS Cache (SSMS 21 and Later)

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How to Clear the SSMS Cache (SSMS 21 and Later) Updated...

The flight recorder: Replaying what an AI agent did on my SQL Server

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“What exactly did it do on my server?” is the first question a DBA...

Announcements from the Microsoft Fabric Community Conference — Barcelona 2026

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

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Let's Talk Certifications

By Grant Fritchey

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The Hidden Security Risks of Role Combination in SSAS Tabular

By Pablo Echeverria

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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;

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