仅当特定列的值不存在时才获取行值

Question

我的数据库中有两个表students：

GRADE_REPORT：

+----------------+-------------+------+
|Student_No .    | SectionId   | Grade| 
+----------------+-------------+------+
| 11             | 85          | B    |     
| 17             | 112         | B    |
| 17             | 119         | C    |     
| 17             | 135         | A    |
| 8              | 85)         | A    |     
| 8              | 92          | A    |
+----------------+-------------+------+

学生：

+----------------+-------------+------+--------+----------------+
| Studentnumber  | name        | Classification| DepartmentName |
+----------------+-------------+---------------+----------------+
| 17             | Bill Smith  | 1             |      CS        |       
| 8              | Bob Brown   | 2             |      CS        |
| 11             | Nick Fiener | 4             |      MATH      |       
+----------------+-------------+------+-----+---------+---------+

我正在尝试查找所有在任何课程中都没有获得 A 成绩的学生的学号、姓名和主要部门。因此，当我运行查询时，我期待以下内容：

+----------------+-------------+----------------+
| Studentnumber  | name        | DepartmentName |
+----------------+-------------+----------------+
| 11             | Nick Fiener | MATH           | 

到目前为止，这是我的声明：

SELECT students.STUDENT.StudentNumber, students.STUDENT.name,
  students.STUDENT.DepartmentName 
FROM students.GRADE_REPORT
INNER JOIN students.STUDENT 
ON students.GRADE_REPORT.StudentNo = students.STUDENT.StudentNumber
WHERE 
( (students.GRADE_REPORT.Grade = "B"  
   OR 
   students.GRADE_REPORT.Grade = "C" ) 
   AND  students.GRADE_REPORT.Grade != "A")  
GROUP BY students.GRADE_REPORT.StudentNo;

Answer 1

SELECT Studentnumber, name, DepartmentName
    FROM Student AS s
    WHERE NOT EXISTS (
            SELECT 1
                FROM Grade_Report
                WHERE Studentnumber = s.Studentnumber
                  AND Grade = 'A'
                     )