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Multiple Identity Inserts

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This week I want to share something that surprised me about using SQL Server's SET IDENTITY_INSERT statement.
I started with two tables with identity columns...

2019-06-25

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Coffee

Weekly reading #19

Good afternoon folks! It is Monday Tuesday already after a long weekend in Poland. I do not know what temperature you have but here we are like in a...

2019-06-25

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The Empty Aggregate

By Steve Jones - SSC Editor

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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