Examine the structure of the STUDENTS table:You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999.Which SQL statement accomplishes this task?（）A.B.C.D.

题目

Examine the structure of the STUDENTS table:You need to create a report of the 10 students who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999.Which SQL statement accomplishes this task?（）

A.

B.

C.

D.

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更多“Examine the structure of the STUDENTS table:You need to create a report of the 10 students ”相关问题

  • 第1题：

    Teaching activities must be based on the students' cognitive development level and the existing experienced knowledge, thus, students' personal knowledge, students' life world and__________ are also the important curriculum resources except textbook.

    A．game activities
    B．labour activities
    C．attitude
    D．direct experience

    答案：D
    解析：
    考查教学活动。教学活动必须建立在学生的认知发展水平和已有的知识经验基础之上。因此，学生的个人知识储备、生活世界和直接经验都是重要的课程资源。所以D项正确。

  • 第2题：

    创建students对象，_______语句可以选出第二个同学的身高。 students数据如下： age height weight 1 19 170 68 2 20 165 65 3 18 175 65

    A．students[1,'height']

    B．students.loc[2,'height']

    C．students.iloc[1, 1]

    D．students['height'][3]


    students.loc[2,'height'];students.iloc[1, 1]

  • 第3题：

    【单选题】按照年龄的升序显示学生信息，正确的命令是？

    A．db.students.find().sort({"age":1})

    B．db.students.find().sort({"age":-1})

    C．db.students.find().sort("age")

    D．db.students.find().sort({"age":"asc"})


    Select MAX(Sage),MIN(Sage),AVG(Sage) from Student

  • 第4题：

    声明并创建一个学生类Student的对象s，下列语法格式正确的是（）。

    A．Student s = Student();

    B．Student s;

    C．Student s = new Student();

    D．Student s = new ();


    C

  • 第5题：

    【单选题】查询成绩在60-80之间的学生信息，正确的语句是？

    A．db.students.find({"score":{$gte:60,$lte:80}})

    B．db.students.find({"score":{$gte:80},{"score":{$lte:60}}})

    C．db.students.find({"score":{$gte:60},{"score":{$te:80}}})

    D．db.students.find({"score":{$gt:80},{"score":{$lt:60}}})


    select a.stud_id,stud_name,course_name,score from tblscore a join tblstudent b on a.stud_id=b.stud_id join tblcourse c on a.course_id=c.course_id where score between 80 and 90 order by score

  • 第6题：

    创建students对象，_______语句可以选出第二个同学的身高。 students数据如下： age height weight 1 19 170 68 2 20 165 65 3 18 175 65

    A．students.loc[2,'height']

    B．students.iloc[1, 1]

    C．students[1,'height']

    D．students['height'][3]


    students.loc[2,'height'];students.iloc[1, 1]

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