COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM Accounts WHERE Industry = 'Manufacturing'

COUNT(DISTINCT)

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

SELECT COUNT(DISTINCT Name) AS DistinctValues FROM Accounts WHERE Industry = 'Manufacturing'

AVG

Returns the average of the column values.

SELECT Industry, AVG(AnnualRevenue) FROM Accounts WHERE Industry = 'Manufacturing'  GROUP BY Industry

MIN

Returns the minimum column value.

SELECT MIN(AnnualRevenue), Industry FROM Accounts WHERE Industry = 'Manufacturing' GROUP BY Industry

MAX

Returns the maximum column value.

SELECT Industry, MAX(AnnualRevenue) FROM Accounts WHERE Industry = 'Manufacturing' GROUP BY Industry

SUM

Returns the total sum of the column values.

SELECT SUM(AnnualRevenue) FROM Accounts WHERE Industry = 'Manufacturing'