COUNT

クエリ条件に一致する行の数を返します。

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

COUNT(DISTINCT)

クエリ条件に一致する、null 以外の個別のフィールド値の数を返します。

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

AVG

カラムの値の平均を返します。

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

MIN

カラムの値の最小値を返します。

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

MAX

カラムの値の最大値を返します。

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

SUM

カラムの値の合計を返します。

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