In the simplest terms, a NULL value represents an unknown value. It's unknown in the sense that the value is: missing from the system, may not be applicable in the current situation, or might be added later. NULL values are different than any other value and are sometimes hard to compare and handle.
The Cincinnati SQL Server Users group is getting going again with a meeting on Tuesday, September 25th. If you are in the area, check out the details.
This installment of the XML Workshop by Jacob Sebastian continues looking at XML Schemas in SQL Server 2005. Here we learn how the format and range of values can be checked using an XML schema.
SQL Server 2005 allows DBAs to set configurations for SSIS packages outside the package to facilitate a smooth transition between different environments.
This article discusses: How SQL injection attacks work, Testing for vulnerabilities, Validating user input, Using .NET features to prevent attacks, and Importance of handling exceptions
The CLR integration in SQL Server 2005 greatly expands on the capabilities of the SQL Server platform. One new area is the ability to build user-defined types and user-defined aggregates. Solomon Rutzky brings us a way to get around some of the limitations in this area with his SQL# toolkit.
Today is the opening day for the PASS conference here in Denver and it's kind of exciting. As many of you read this, I've hopefully gotten Simon Galbraith, owner of Red Gate software, and my boss, out here at the ranch shoveling manure. He's anxious to get on the ATV for a ride, so maybe I can work out a deal to reduce my workload 🙂
In the latest in their popular series on 'Unit Testing' database development work , Alex K and Alex S give some examples of unit testing Database Modifications
We've compiled a list of our dozen most popular tips in the area of upgrading to SQL Server 2005 and they run the gamut.
Everyone wants to know what a DBA does and it is becoming a hard question to answer as the responsibilities and capabilities of database platforms increase. Longtime author Vincent Rainardi brings us the proposition of a new type fo DBA, one that focuses more on data warehousing.
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I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers