Check digits–not to be confused with checksums–are often added to numeric identifiers such as customer and product numbers to reduce the chance of incorrect entries. Sequences of numbers are notoriously easy to mistype, and constraints alone generally won't do the job. In this excellent article, Lynn Fields shows you how to implement the "Cadillac" of check digit methods–the Verhoeff Dihedral Group.
The fourth part of Steve Jones series looking at employee retention. In this article, he examines a few techniques that can help the employee ensure their own retention.
One of the most difficult database operations to scale-up on high-end server systems is the network call. In fact, without special precautions, a high call volume database application can have severe negative scaling on large systems. It is suspected that this problem is more pronounced on NUMA systems than basic SMP systems. A NUMA system with 16 processors can have significantly lower throughput capability than an otherwise comparable 4-way SMP system.
Auditing, analyzing and documenting your SQL Server installation is becoming more important all the time, especially as more and more attention is being paid to the security of your environment. Chad Miller brings us a look at a framework and a sample document you can use in your environment to conduct an audit.
There is an important technique for creating truly agile databases that I haven’t seen in his writings; one which is well-known to DBAs, but little understood in the application development community – the use of database views to create a layer of abstraction between the normalized relational tables and the applications that use the data.
SQL Server 2000 has a great job and alert subsystem, but it doesn't do everything. There are times when you want to be notified that something has completed, or not completed. New author Frank Loschiavo brings us a way to ensure that when you run a query you are notified if and when it completes.
In this article, I will introduce a significant improvement that underlies the new Analysis Services development approach, the Data Source View. A Data Source View is a design-time object that makes its home in the workbench environment of the Business Intelligence Development Studio.
In testing your applications, one of the things that you often want to do is run through a list of all possible values for some particular piece of code. Eli Leiba brings us a method for autmatically generating all the possible permutations for input values.
SQL Server Profiler can correlate Microsoft Windows System Monitor (Performance Monitor in Windows NT 4.0) counters with SQL Server or SQL Server 2005 Analysis Services (SSAS) events. Windows System Monitor logs system activity for specified counters in performance logs. The first thing to remember is in order to have correlating information you need to obviously be in sync - in other words you must start the perfmon trace and profiler trace at the same time or else they won't match up.
Have you ever wanted an easy way to determine if a job is running for automated checks? This might not be an easy way, but Leo Peysakhovich provides a way that works and corrects an error in Books Online.
By Steve Jones
I coach volleyball and I do a lot of stat stuff on paper. I...
By Steve Jones
dolorblindness – n. the frustration that you’ll never be able to understand another person’s...
By Steve Jones
I had a customer ask about analyzing their Test Data Manager (TDM) usage to...
Is there a good syllabus for reading these two together? (Yes, it's called the...
Comments posted to this topic are about the item GPX distance and time analysis...
Comments posted to this topic are about the item The DBA is Dead; Long...
In SQL Server 2025, if I want to remove an IP from a listener, what do I do?
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