Displaying Hierarchical Data

Producing hierarchies from SQL tables can necessitate joining a table to itself. This article will explain how you can do this.

Count the Number of Weekend Days between Two Dates

Handling weekends can be tricky in SQL. This article shows you how to Count the Number of Weekend Days between Two Dates

Aggregate Data for the Last Day of the Month

On some occasions you will need to aggregate Data for the Last Day of the Month. This article explains how.

How am I doing?

Using a CTE as a Tally Table

Sometimes you need to output blank lines
- in effect displaying Records for Missing Data. This article explains how to use a CTE to do this

Using a Derived Table to Compare Data with Values from a Previous Year

Comparing year on year sales is a fundamental requirement in much commercial analysis - here you learn how to do this in SQL

Drop table in one shot

Display Median Values

DO you know how to display median values from a Dataset? In this short article you will use windowing functions to do this

Variable assignments

T-SQL Window Functions and Performance

T-SQL window functions, introduced in 2005 with enhancements in 2012, are great additions to the T-SQL language. In this article, Kathi Kellenberger explains what you need to know to get good performance when using these functions.