Mark Chaffin

Mark Chaffin is Data Warehouse Architect for Encore Development (http://www.encoredev.com) and has developed numerous decision support systems for clients in such industries as technology, mortgage banking, retail, financial services and insurance. He also has experience in clickstream analytics, data mining, transactional application architecture, Internet application architecture, database administration and database design. He has completed a book about Data Transformation Services with Brian Knight (http://www.sqlservercentral.com/columnists/bknight).

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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...

Au Revoir for now

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

Goodbye, Microsoft

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

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Let's Talk Certifications

By Grant Fritchey

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

FARE LABS Pvt. Ltd. is a Proficiency testing laboratory located in India.

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The top proficiency testing facility in India is Fare Labs. We employ particular metrics...

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...

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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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