Generates prime numbers and puts them into a table for future reference by adhoc queries and database and application code. 100% set-based. DDL embedded.  Read more...

Sixth in a series of scripts demonstrating a quantitative comparison between the text of two stored procedures  Read more...

Just because it looks set based, doesn't mean it is. T-SQL Crackerjack Jeff Moden takes a look at a mistake that many query writers make.  Read more...

Feed it two delimited strings of horizontal data and it returns it back as a vertical table with the two column data in the same synchronized position order.  Read more...

Feed it large strings of double-delimited horizontal data and it returns it back as a non-pivoted vertical table with a 2-diemensional star schema.  Read more...

Feed it delimited horizontal data and it returns it back as a vertical table.  Read more...

Feed it double-delimited horizontal data and it returns it back as a non-pivoted vertical table with a 2-diemensional star schema.  Read more...

Just because it looks set based, doesn't mean it is. T-SQL Crackerjack Jeff Moden takes a look at a mistake that many query writers make.  Read more...

Feed it large strings of delimited horizontal data and it returns it back as a vertical table.  Read more...

Sets up 3 'table of numbers' that completely fill a 1, 2, and 3-level clustered index respectivly with 622, 386884, and 240641848 numbers.  Read more...

Sets up 3 'table of numbers' that completely fill a 1, 2, and 3-level clustered index respectivly with 620, 384400, and 238328000 numbers.  Read more...

A Sudoku solution with set based T-SQL approach utilizing binary values and operators, to ease the algorithm.  Read more...

One of the very common questions posted about T-SQL is how to traverse a hierarchy in a set based manner. New author Craig Hatley brings us his techniques for handling the common scenario of employees and managers.   Read more...

In an interesting exercise in data conversion, Stephen Lasham brings us a nice article on basic manipulations.   Read more...

Tool to automatically query combinations of columns in your table to determine candidate for unique key.  Read more...

Part I of this series illustrated how to use simple case functions in queries. This installment discusses how to use case functions in different types of scenarios.  Read more...

Working with NULL functions can be tricky in T-SQL and SQL Server 2000. If you add in aggregates, you need to be sure you understand what the behavior will be or you might report incorrect values to a user. Michael Coles has written a new article that talks about how NULL affects your results.   Read more...

In this article I discuss a new feature in SQL 2008, table-valued parameters and particularly the restriction that they have to be read-only. I argue that this makes this feature considerably less useful that it could be, and that in order to build scalable applications be able to pass read-write table parameters between stored procedures is essential.  Read more...

In SQL Server 2000 or any relational database, the concept of NULL can be both confusing and hazardess to your employment. Not understanding how to work with NULLs can lead to incorrect responses to queries and poor business decisions being made. New author Michael Coles brings us four rules that can help you work with NULL values in your tables.   Read more...

Truth tables are an important part of working with logical values in SQL Server. Yousef Ekhtiari brings us some T-SQL that can help you construct those many variable truth tables and ensure you are getting the results you expect.   Read more...

Just because it looks set based, doesn't mean it is. T-SQL Crackerjack Jeff Moden takes a look at a mistake that many query writers make.  Read more...

Learn how to solve a couple of common T-SQL issues with MVP Jeff Moden.  Read more...

Dealing with NULL data is something that often confuses new SQL Server developers, but even experienced DBAs might not understand all the intricacies of NULL operations. In a follow up to his highly acclaimed Four Rules of Null article, Michael Coles brings us a few new tricks with NULLs.   Read more...