Using OVER with an Aggregate Function

Generating SubTotals using GROUPING

This article explains how to use the GROUPING clause to generate subtotals for rows in a very easy fashion.

COUNT_BIG

Pivoting, Unpivoting and Aggregating

We asked Phil Factor to write a nice simple quick-start guide about aggregation, pivoting and un-pivoting techniques. To do so, he takes us all the way from getting the data from a published source, transferring it to SQL Server, un-pivoting it, storing it in a relational table, aggregating it and finally pivoting the data in a variety of ways.

Three Sample reports for the Automated DBA: Space Usage SnapShotter

1100 largest indexes by total buffer cache usage; 100 largest tables by total reserved pages; Largest tables in each database with running total of space usage and growth since last snapshot

Median Workbench

SQL Server database engine doesn't have a MEDIAN() aggregate function. This is probably because there are several types of median, such as statistical, financial or vector medians. Calculating Medians are essentially a row-positioning task, since medians are the middle value of an ordered result. Easy to do in SQL? Nope. Joe Celko explains why.

SUM of FLOAT inconsistency

Accessing and changing data 2008

Summarizing Data with Aggregate Queries - SQL School Video

Learn how to summarize the values of your data using aggregate functions such as COUNT(), SUM(), and AVG() from MVP Kathi Kellenberger. Grouping and aggregate filters are covered as well.

Calculating Mathematical Values in SQL Server

In our application we have the need to perform mathematical calculations. Right now we are doing so in our front end application. Unfortunately we are starting to experience performance problems with large data sets and differences in calculations due to developers using different logic. We are seeking some other options to perform the calculations. Does SQL Server perform basic mathematical calculations?