Blog Post

Replication Error "memory mapped file read failed"

I was fighting an error that was very rare to appear. I originally put a post on a MS forum
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.sqlserver.replication&tid=57229124-0a5a-4ec3-9055-a06b7869b872&cat=&lang=&cr=&sloc=&p=1
The...

2008-07-02

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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