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106年

第 2 題

2.5 分

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Suppose we wish to have a table for each course containing the grade of each registered student. Which of the following design is better than the others?

a.The table contains just two fields: Student_Name, Grade.b.The table contains just two fields: Student_ID, Grade.c.The table contains three fields: Student_ID, Student_Name, Grade.d.The table contains three fields: Student_Name, Instructor_ID, Grade.e.The table contains four fields: Student_ID, Student_Name, Instructor_ID, Grade.