每日总结
MongoDB数据库操作
(1)用MongoDB Shell设计出student集合;
db.bbb.save([{"name":"zhangsan","score": {"English": "69","Math": "86","Computer": "77"}},{"name": "lisi","score": {"English": "55","Math": "100","Computer": "88"}}])
(2)用find()方法输出两个学生的信息;
(3) 用find()方法查询zhangsan的所有成绩(只显示score列)
(4)修改lisi的Math成绩,改为95。