Tony Davis

  • Interests: football, modern literature, real ale

External Article

What’s New in SQL Monitor 10?

SQL Monitor 10 packs a lot more under the hood in terms of connectivity, establishing cause-and-effect, and alerting. This article provides the high-level tour of the features we've introduced or improved, and why.

2020-03-20

SQLServerCentral Editorial

Swallowing the Camel

There is a paradox in the nature of the abstractions that many developers want when dealing with databases. They will strain at the gnat, but swallow a camel (Matthew 23:24). Whereas they will recoil with horror when a DBA suggests that an abstraction layer based on views, functions and procedures in a separate database schema […]

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2014-09-15

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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