.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Melody Anderson

Post New Resource Bookmark and Share   

Aggregate Functions in SQL SERVER 2008

Posted By:Gowthammanju       Posted Date: July 31, 2011    Points: 200    Category:    URL: http://www.dotnetspark.com  

This article explains about Various aggregartion function in sql 2008

What are Aggregate functions? Explain Aggregate functions in SQL SERVER 2008 with example.

Aggregate functions are applied to a group of data values from a column. Aggregate functions always return a single value.

SQL SERVER 2008 / Transact-SQL supports following aggregate functions:

AVG: Calculates the arithmetic mean (average) of the data values contained within a column. The column must contain numeric values.

MAX and MIN: Calculate the maximum and minimum data value of the column, respectively. The column can contain numeric, string, and date/time values.

SUM: Calculates the total of all data values in a column. The column must contain numeric values.

COUNT: Calculates the number of (non-null) data values in a column. The only aggregate function not being applied to columns is COUNT(*). This function returns the number of rows (whether or not particular columns have NULL values).

COUNT_BIG: New and Analogous to COUNT, the only difference being that COUNT_BIG returns a value of the BIGINT data type.

Aggregate function Example:
SELECT ProjectName, SUM(budget) TotalBudget FROM Project_Tbl GROUP BY ProjectName;


Further Readings:


No response found. Be the first to respond this post

Post Comment

You must Sign In To post reply

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend