BNF Basics
Learn about the basics of Backus–Naur Form. If you've never heard of this, Tom Fischer explores this way of structuring technical information.
2009-08-12
11,321 reads
Tom Fischer
Lesson Learned from Contracting, Revisited
A few notes from a consulting engagement that might get you to think about what to expect from your next contractors.
2008-04-15
6,382 reads
Writing SQL Faster
All of us would like to code faster and with fewer mistakes. While a third party tool usualy won't help with the latter, there are a few to help you increase the speed at which you build readable code. New author Tom Fisher brings us a short tutorial on using a couple of Red Gate's tools.
2007-06-28
11,085 reads
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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;
See possible answers