阅读下面SQL代码:CREATE TABLE student(id INT(3) PRIMARY KEY AUTO_INCREMENT,name VARCHAR(20) NOT NULL,grade FLOAT,);下面选项中,用于查询表中所有记录信息的SQL语句是
A. SEELCT * FROM student
B. SEELCT id,name FROM student LIMIT 2,3;
C. SEELCT id,name,grade FROM student;
D. SEELCT id,name FROM student;
假设有学生表tb_student,请问统计学生总人数,正确的语句是()
A. Select sum(*) from tb_student
B. Select count(*) from tb_student
C. Select count(学号) from tb_student
D. Select max(*) from tb_student