单选题
发布日期:2020-04-10
SELECT MAX (gpa) FROM student _ grades WHERE gpa IS NOT NULL;
SELECT (gpa) FROM student _ grades GROUP BY semester_end WHERE gpa IS NOT NULL;
SELECT MAX (gpa) FROM student _ grades WHERE gpa IS NOT NULL GROUP BY semester_end;
SELECT MAX (gpa) GROUP BY semester_end WHERE gpa IS NOT NULL FROM student _ grades;
SELECT MAX (gpa) FROM student _ grades GROUP BY semester_end WHERE gpa IS NOT NULL;
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