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Tony Davis

The Railmap Towards Easier Query Tuning?

There are certain infographics that ‘speak’ to everyone. They represent highly complex concepts clearly and unequivocally. Unfortunately, the SQL Server graphical execution plan is not one of them. Read more...

Dennes Torres

Identify Object Name from Page ID

Sometimes, while searching the root cause of database problems, we face page IDs and need to find to which object that page belongs. We can find this information using DBCC Page, but it’s a manual procedure, we need to execute this command and look the text result to find the object id. Read more...

Nicolas Prigent

PowerShell Day-to-Day Admin Tasks: Monitoring Performance

By reading performance counters from services such as SQL Server or Exchange, you can get a wealth of performance information. By automating the process of gathering and storing appropriate counters, you can routinely check a range of devices quickly using visual tools such as PerfMon. By then creating your own counters, you can add counter-based metrics to anything that can be measured programmatically, such as services, applications, processes such as ETL, or deployments. Read more...

Devyani Borade

Think You Can Be a Software Tester?

We all use software, and we all find it alarmingly easy to find bugs in it. Does that mean that we have a natural talent for testing software? Devyani suggests that there are some qualities that characterise software testers who are very good at their job. No matter whether you were born like that, or if you've worked upon, practised, developed and acquired them over time, they make all the difference. Read more...

Adam Bertram

Questions About Devops that IT Pros are Too Shy to Ask

DevOps isn't a particular technology, nor a job role. It is more of a software development method, initiating originally from system administrators, that promotes ways of enhancing collaboration and communication between development, QA, and IT operations throughout the entire software delivery pipeline with the aim of faster software delivery. Adam Bertrand answers the four most common questions that IT Pro's wonder about, but seldom ask publicly. Read more...

Feodor Georgiev

Getting to know your customers better – cohort analysis and RFM segmentation in R

It often pays to use a tool like R, in conjunction with a relational database, to quickly perform a range of analyses, and graphs, in order to ensure that you're answering the right question, to explore alternative hypotheses, or to provide insight into a problem. Feodor demonstrates how to quickly, and interactively, explore the ways that customers purchase goods and services using cohort analysis. Read more...

Robert Sheldon

How to Get NULLs Horribly Wrong in SQL Server

NULLs in SQL are a mixed blessing.The Three-Valued Logic of SQL has its uses but can cause difficulties to anyone who assumes that NULL has a 'value'. It can make reports go horribly wrong in a number of alarming ways, as Robert Sheldon explains Read more...

Michael Sorens

The Poster of the Plethora of PowerShell Pitfalls

One of the downsides of learning a new computer language is that transfer of training doesn't always work to your advantage. In fact, the habits you picked up in the past may now cause confusion. In this poster or wall-chart for long walls, Michael Sorens selects the thirty-six most common causes of confusion for anyone getting to grips with PowerShell. Forewarned is forearmed. Read more...

Dwain Camps

Software Engineering: Just How Immature is it?

"Facts and Fallacies of Software Engineering” by Robert L. Glass has become a classic of Software Engineering as cherished as 'The Mythical Man-Month: Essays on Software Engineering' by Frederick P. Brooks. They seem as radical today as when first written, mainly because the software industry repeatedly fails to learn from its mistakes. Dwain Camps reviews the book. Read more...

Tom Fischer

Safe(r) Custom User-Authentication

If you are still storing passwords with MD5 hashing you're doing it wrong. The .NET platform provides a Cryptography library that allows you to develop PBKDF2 user authentication to the standards of the Open Web Application Security Project. Tom Fischer explains the background, shows a solution, and discusses the issues. Read more...

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