Aggregate Functions
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 [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Id) AS DistinctValues FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu'
AVG
Returns the average of the column values.
SELECT ProductName, AVG(Price) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu' GROUP BY ProductName
MIN
Returns the minimum column value.
SELECT MIN(Price), ProductName FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu' GROUP BY ProductName
MAX
Returns the maximum column value.
SELECT ProductName, MAX(Price) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu' GROUP BY ProductName
SUM
Returns the total sum of the column values.
SELECT SUM(Price) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Id) AS DistinctValues FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu'
AVG
Returns the average of the column values.
SELECT ProductName, AVG(Price) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu' GROUP BY ProductName
MIN
Returns the minimum column value.
SELECT MIN(Price), ProductName FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu' GROUP BY ProductName
MAX
Returns the maximum column value.
SELECT ProductName, MAX(Price) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu' GROUP BY ProductName
SUM
Returns the total sum of the column values.
SELECT SUM(Price) FROM [DemoDB].[PUBLIC].Products WHERE ProductName = 'Konbu'