COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM Contacts WHERE BusinessAddress_City = 'Raleigh'

COUNT(DISTINCT)

Returns the number of distinct, non-null field values matching the query criteria.

SELECT COUNT(DISTINCT LastModifiedByName) AS DistinctValues FROM Contacts WHERE BusinessAddress_City = 'Raleigh'

AVG

Returns the average of the column values.

SELECT GivenName, AVG(AnnualRevenue) FROM Contacts WHERE BusinessAddress_City = 'Raleigh'  GROUP BY GivenName

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), GivenName FROM Contacts WHERE BusinessAddress_City = 'Raleigh' GROUP BY GivenName

MAX

Returns the maximum column value.

SELECT GivenName, MAX(AnnualRevenue) FROM Contacts WHERE BusinessAddress_City = 'Raleigh' GROUP BY GivenName

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM Contacts WHERE BusinessAddress_City = 'Raleigh'