A nice collection of puzzles. Some are harder than others so there is something for everyone. You can pic any language you want, you will see that there are solutions in Ruby, Python, Visual Basic, SQL, JavaScript, C++ and others

SQL Server Precision And Scale Problems

Troubleshooting Blocking 101 on SQL Server

An interview with Roy Osherove author of "The Art of Unit Testing"

Interview With Louis Davidson Author of Pro SQL Server 2008 Relational Database Design and Implementation

A better way to create a single instance application

A 5 part blogpost about the performance of a select statement done with ADO.Net using inline sql, and stored procedures (even some dynamic sql) and then nHibernate to get the same results. But this one has an alternate ending.

Awesome collection of ASP.NET hacks

Creativity is a wonderful thing. It's also something different for each of us, which is why sometimes our perspectives on the world can produce conflicting ideas on what is the right way and the wrong way to do things. This is a very common facet of the IT world, in particular making computer software, solutions and services. We don't need architects! …Do we ?

Microsoft Has Released Tools To Address SQL Injection Attacks

This is a collection of SQL hacks, right now we there are 8 sections and between 70 and 80 hacks.

Source Analysis for C#. This tool is known internally within Microsoft as StyleCop, and has been used for many years now to help teams enforce a common set of best practices for layout, readability, maintainability, and documentation of C# source code.