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 Customers WHERE Delinquent = 'False'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Discount) AS DistinctValues FROM Customers WHERE Delinquent = 'False'
AVG
Returns the average of the column values.
SELECT Email, AVG(TotalRowCount) FROM Customers WHERE Delinquent = 'False' GROUP BY Email
MIN
Returns the minimum column value.
SELECT MIN(TotalRowCount), Email FROM Customers WHERE Delinquent = 'False' GROUP BY Email
MAX
Returns the maximum column value.
SELECT Email, MAX(TotalRowCount) FROM Customers WHERE Delinquent = 'False' GROUP BY Email
SUM
Returns the total sum of the column values.
SELECT SUM(TotalRowCount) FROM Customers WHERE Delinquent = 'False'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Customers WHERE Delinquent = 'False'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Discount) AS DistinctValues FROM Customers WHERE Delinquent = 'False'
AVG
Returns the average of the column values.
SELECT Email, AVG(TotalRowCount) FROM Customers WHERE Delinquent = 'False' GROUP BY Email
MIN
Returns the minimum column value.
SELECT MIN(TotalRowCount), Email FROM Customers WHERE Delinquent = 'False' GROUP BY Email
MAX
Returns the maximum column value.
SELECT Email, MAX(TotalRowCount) FROM Customers WHERE Delinquent = 'False' GROUP BY Email
SUM
Returns the total sum of the column values.
SELECT SUM(TotalRowCount) FROM Customers WHERE Delinquent = 'False'