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请在本地创建一个学生考试系统的数据库(student_examination_sys),里面有三张表:

  1. 学生表(student):

    id name age sex
    001 张三 18
    002 李四 20
  2. 考试科目表(subject):

    id subject teacher description
    1001 语文 王老师 本次考试比较简单
    1002 数学 刘老师 本次考试比较难
  3. 成绩表(score):

    id student_id subject_id score
    1 001 1001 80
    2 002 1002 60
    3 001 1001 70
    4 002 1002 60.5

请用SQL实现上面的需求并将实现的效果截图说明。

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