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Dynamically Unpivot columns in SQL

Picture this, your data ingestion team has created a table that has the sales for each month year split into different columns. At first glance, you may think “what’s...

2024-05-27 (first published: )

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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