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 NorthwindOData WHERE personal.name.last = '[email protected]'

COUNT(DISTINCT)

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

SELECT COUNT(DISTINCT personal.name.first) AS DistinctValues FROM NorthwindOData WHERE personal.name.last = '[email protected]'

AVG

Returns the average of the column values.

SELECT personal.name.last, AVG(AnnualRevenue) FROM NorthwindOData WHERE personal.name.last = '[email protected]' GROUP BY personal.name.last

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), personal.name.last FROM NorthwindOData WHERE personal.name.last = '[email protected]' GROUP BY personal.name.last

MAX

Returns the maximum column value.

SELECT personal.name.last, MAX(AnnualRevenue) FROM NorthwindOData WHERE personal.name.last = '[email protected]' GROUP BY personal.name.last

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM NorthwindOData WHERE personal.name.last = '[email protected]'

COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM NorthwindOData WHERE personal.name.last = '[email protected]'

COUNT(DISTINCT)

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

SELECT COUNT(DISTINCT personal.name.first) AS DistinctValues FROM NorthwindOData WHERE personal.name.last = '[email protected]'

AVG

Returns the average of the column values.

SELECT personal.name.last, AVG(AnnualRevenue) FROM NorthwindOData WHERE personal.name.last = '[email protected]'  GROUP BY personal.name.last

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), personal.name.last FROM NorthwindOData WHERE personal.name.last = '[email protected]' GROUP BY personal.name.last

MAX

Returns the maximum column value.

SELECT personal.name.last, MAX(AnnualRevenue) FROM NorthwindOData WHERE personal.name.last = '[email protected]' GROUP BY personal.name.last

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM NorthwindOData WHERE personal.name.last = '[email protected]'