Examples of Aggregate Functions

Below are several examples of SQL aggregate functions. You can use these with a GROUP BY clause to aggregate rows based on the specified GROUP BY criterion. This can be a reporting tool.

COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM TrafficReportByListing WHERE ListingId = '201284405428'

COUNT(DISTINCT)

Returns the number of distinct, non-null field values matching the query criteria.

SELECT COUNT(DISTINCT ListingName) AS DistinctValues FROM TrafficReportByListing WHERE ListingId = '201284405428'

COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM TrafficReportByListing WHERE ListingId = '201284405428'

COUNT(DISTINCT)

Returns the number of distinct, non-null field values matching the query criteria.

SELECT COUNT(DISTINCT ListingName) AS DistinctValues FROM TrafficReportByListing WHERE ListingId = '201284405428'

AVG

Returns the average of the column values.

SELECT ClickThroughRate, AVG(AnnualRevenue) FROM TrafficReportByListing WHERE ListingId = '201284405428'  GROUP BY ClickThroughRate

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), ClickThroughRate FROM TrafficReportByListing WHERE ListingId = '201284405428' GROUP BY ClickThroughRate

MAX

Returns the maximum column value.

SELECT ClickThroughRate, MAX(AnnualRevenue) FROM TrafficReportByListing WHERE ListingId = '201284405428' GROUP BY ClickThroughRate

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM TrafficReportByListing WHERE ListingId = '201284405428'