Finding Gaps in Sequential Data Using SQL Server
Many systems expect a sequential range of numbers for invoices, ticket numbers, and more. Learn how you can identify where you have gaps in your sequences.
2026-09-21
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Temporary Tables
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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] GOWhat 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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