插入张瓜赵四
db.Person.insert({"name":"张瓜","age":10})WriteResult({"nInserted":1})
db.Person.insert({"name":"赵四","age":20})WriteResult({"nInserted":1})
查询张瓜
> db.Person.find({"name":"张瓜"}){"_id":ObjectId("5617275737a5aa2cafdb4b84"),"name":"张瓜","age":10}>
查询所有信息
db.Person.find()
{"_id":ObjectId("5617277b37a5aa2cafdb4b85"),"name":"赵四","age":20}{"_id":ObjectId("56172d069d1af21ad1f769c7"),"name":"张瓜","age":40}
改张瓜年龄
db.Person.update({"name":"张瓜"}, {"name":"张瓜","age":40})WriteResult({"nMatched":1,"nUpserted":0,"nModified":1})
查询张瓜此时年龄变成40
db.Person.find({"name":"张瓜"}) {"_id":ObjectId("56172d069d1af21ad1f769c7"),"name":"张瓜","age":40}
删除
db.Person.remove({"name":"张瓜"})WriteResult({"nRemoved":1})>
db.Person.find()
此时已删除张瓜，显示赵四信息
{"_id":ObjectId("5617277b37a5aa2cafdb4b85"),"name":"赵四","age":20}
