> db.python.find()
{ "_id" : ObjectId("5d2df2e90d58cd586aea5a99"), "name" : "kang" }
> db.python.insert({x:1000})
WriteResult({ "nInserted" : 1 })
> db.python.find()
{ "_id" : ObjectId("5d2df2e90d58cd586aea5a99"), "name" : "kang" }
{ "_id" : ObjectId("5d2df447a3afbb61f365b89b"), "x" : 1000 }
>
原文:https://blog.51cto.com/12965094/2420880