下列选项中，与INSERT INTO student SET id=5,name='boya',grade=99;功能相同的SQL语句是（ ）
A. INSERT INTO student(id,name, grade)VALUES(5, 'boya', 99);
B. INSERT INTO student VALUES('youjun',5,99);
C. INSERT INTO student(id,‘grade’,’name’)VALUES(5,’boya’,99);
D. INSERT INTO student(id,grade,’name’)VALUES(5,99,”boya”);
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下面选项中，用于求出某个字段的最大值的函数是（ ）
A. avg()
B. max()
C. min()
D. total()
将student表按照gender字段进行分组查询，查询出grade字段值之和小于300的分组，依据上述要求，下面选项中，正确的SQL语句是（）
A. SELECT sum(grade),gender FROM student GROUP BY gender HAVING SUM(grade)<300;
B. SELECT sum(grade),gender FROM student GROUP BY gender WHERE SUM(grade)<300;
C. SELECT sum(grade),gender FROM student WHERE SUM(grade)<300 GROUP BY gender;
D. 以上语句都不对
进行子查询时，用于测试条件返回的是TRUE或FALSE的关键字是（ ）
A. IN
B. ON
C. EXISTS
D. NOT IN
给定如下SQL语句：SELECT employee.name, department.dname FROM department,employeeWHERE department.did=employee.did;下面选项中，与其功能相同的是（ ）
A. SELECT employee.name, department.dname FROM department JOIN employee ON department.did=employee.did;
B. SELECT employee.name, department.dname FROM department CROSS JOIN employee ON department.did=employee.did;
C. SELECT employee.name, department.dname FROM department LEFT JOIN employee ON department.did=employee.did;
D. SELECT employee.name, department.dname FROM department RIGHT JOIN employee ON department.did=employee.did;
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