COUNT

Returns the number of rows matching the query criteria.

SELECT COUNT(*) FROM Customers WHERE Delinquent = 'False'

COUNT(DISTINCT)

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

SELECT COUNT(DISTINCT Discount) AS DistinctValues FROM Customers WHERE Delinquent = 'False'

AVG

Returns the average of the column values.

SELECT Email, AVG(TotalRowCount) FROM Customers WHERE Delinquent = 'False'  GROUP BY Email

MIN

Returns the minimum column value.

SELECT MIN(TotalRowCount), Email FROM Customers WHERE Delinquent = 'False' GROUP BY Email

MAX

Returns the maximum column value.

SELECT Email, MAX(TotalRowCount) FROM Customers WHERE Delinquent = 'False' GROUP BY Email

SUM

Returns the total sum of the column values.

SELECT SUM(TotalRowCount) FROM Customers WHERE Delinquent = 'False'