有关系模型Students(学号,姓名,性别,出生年月),要统计学生的人数和平均年龄应使用的语句是
A.
SELECT COUNT()As人数,AVG(YEAR(出生年月))AS平均年龄FROM Students;
B.
SELECT COUNT(})As人数,AVG(YEAR(出生年月))AS平均年龄FROM Students;
C.
SELECT COUNT(*)As人数,AVG(YEAR(DATE())-YEAR(出生年月))AS平均年龄FROM Students;
D.
SELECT COUNT()AS人数,AVG(YEAR(DATE())-YEAR(出生年月))AS平均年龄FROM Students;