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OPENJSON and CROSS APPLY

OPENJSON is pretty central to manipulating JSON documents in T-SQL. As we’ve seen, we can use a default schema that will return metadata about the JSON document or we...

2020-06-24 (first published: )

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TSQL Tuesday

This month’s (#127) T-SQL Tuesday is brought by Kenneth Fisher (B | T) and he asked about Non SQL Tips and tricks. As a Windows user I know there...

2020-06-09

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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