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 WebSearch WHERE SearchTerms = 'Microsoft'

COUNT(DISTINCT)

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

SELECT COUNT(DISTINCT URL) AS DistinctValues FROM WebSearch WHERE SearchTerms = 'Microsoft'

COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM WebSearch WHERE SearchTerms = 'Microsoft'

COUNT(DISTINCT)

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

SELECT COUNT(DISTINCT URL) AS DistinctValues FROM WebSearch WHERE SearchTerms = 'Microsoft'

AVG

Returns the average of the column values.

SELECT Title, AVG(AnnualRevenue) FROM WebSearch WHERE SearchTerms = 'Microsoft'  GROUP BY Title

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), Title FROM WebSearch WHERE SearchTerms = 'Microsoft' GROUP BY Title

MAX

Returns the maximum column value.

SELECT Title, MAX(AnnualRevenue) FROM WebSearch WHERE SearchTerms = 'Microsoft' GROUP BY Title

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM WebSearch WHERE SearchTerms = 'Microsoft'