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 Calendar WHERE Location <> 'Chapel Hill'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Id) AS DistinctValues FROM Calendar WHERE Location <> 'Chapel Hill'
AVG
Returns the average of the column values.
SELECT Location, AVG(AnnualRevenue) FROM Calendar WHERE Location <> 'Chapel Hill' GROUP BY Location
MIN
Returns the minimum column value.
SELECT MIN(AnnualRevenue), Location FROM Calendar WHERE Location <> 'Chapel Hill' GROUP BY Location
MAX
Returns the maximum column value.
SELECT Location, MAX(AnnualRevenue) FROM Calendar WHERE Location <> 'Chapel Hill' GROUP BY Location
SUM
Returns the total sum of the column values.
SELECT SUM(AnnualRevenue) FROM Calendar WHERE Location = 'Chapel Hill'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Calendar WHERE Location = 'Chapel Hill'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Id) AS DistinctValues FROM Calendar WHERE Location <> 'Chapel Hill'
AVG
Returns the average of the column values.
SELECT Location, AVG(AnnualRevenue) FROM Calendar WHERE Location <> 'Chapel Hill' GROUP BY Location
MIN
Returns the minimum column value.
SELECT MIN(AnnualRevenue), Location FROM Calendar WHERE Location <> 'Chapel Hill' GROUP BY Location
MAX
Returns the maximum column value.
SELECT Location, MAX(AnnualRevenue) FROM Calendar WHERE Location <> 'Chapel Hill' GROUP BY Location
SUM
Returns the total sum of the column values.
SELECT SUM(AnnualRevenue) FROM Calendar WHERE Location = 'Chapel Hill'