Jeffrey Yao

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Database administration culture

"Culture", according to Merriam-Webster Dictionary http://www.merriam-webster.com/dictionary/culture, has one definition as
"the set of shared attitudes, values, goals, and practices that characterizes an...

2008-08-16

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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;

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