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 Account WHERE acctName = 'Checking'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT InternalId) AS DistinctValues FROM Account WHERE acctName = 'Checking'
AVG
Returns the average of the column values.
SELECT AcctName, AVG(AnnualRevenue) FROM Account WHERE acctName = 'Checking' GROUP BY AcctName
MIN
Returns the minimum column value.
SELECT MIN(AnnualRevenue), AcctName FROM Account WHERE acctName = 'Checking' GROUP BY AcctName
MAX
Returns the maximum column value.
SELECT AcctName, MAX(AnnualRevenue) FROM Account WHERE acctName = 'Checking' GROUP BY AcctName
SUM
Returns the total sum of the column values.
SELECT SUM(AnnualRevenue) FROM Account WHERE acctName = 'Checking'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Account WHERE acctName = 'Checking'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT InternalId) AS DistinctValues FROM Account WHERE acctName = 'Checking'
AVG
Returns the average of the column values.
SELECT AcctName, AVG(AnnualRevenue) FROM Account WHERE acctName = 'Checking' GROUP BY AcctName
MIN
Returns the minimum column value.
SELECT MIN(AnnualRevenue), AcctName FROM Account WHERE acctName = 'Checking' GROUP BY AcctName
MAX
Returns the maximum column value.
SELECT AcctName, MAX(AnnualRevenue) FROM Account WHERE acctName = 'Checking' GROUP BY AcctName
SUM
Returns the total sum of the column values.
SELECT SUM(AnnualRevenue) FROM Account WHERE acctName = 'Checking'