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 Orders WHERE DocType = 'dDocument_Items'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT DocEntry) AS DistinctValues FROM Orders WHERE DocType = 'dDocument_Items'
AVG
Returns the average of the column values.
SELECT DocType, AVG(DocNum) FROM Orders WHERE DocType = 'dDocument_Items' GROUP BY DocType
MIN
Returns the minimum column value.
SELECT MIN(DocNum), DocType FROM Orders WHERE DocType = 'dDocument_Items' GROUP BY DocType
MAX
Returns the maximum column value.
SELECT DocType, MAX(DocNum) FROM Orders WHERE DocType = 'dDocument_Items' GROUP BY DocType
SUM
Returns the total sum of the column values.
SELECT SUM(DocNum) FROM Orders WHERE DocType = 'dDocument_Items'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Orders WHERE DocType = 'dDocument_Items'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT DocEntry) AS DistinctValues FROM Orders WHERE DocType = 'dDocument_Items'
AVG
Returns the average of the column values.
SELECT DocType, AVG(DocNum) FROM Orders WHERE DocType = 'dDocument_Items' GROUP BY DocType
MIN
Returns the minimum column value.
SELECT MIN(DocNum), DocType FROM Orders WHERE DocType = 'dDocument_Items' GROUP BY DocType
MAX
Returns the maximum column value.
SELECT DocType, MAX(DocNum) FROM Orders WHERE DocType = 'dDocument_Items' GROUP BY DocType
SUM
Returns the total sum of the column values.
SELECT SUM(DocNum) FROM Orders WHERE DocType = 'dDocument_Items'