> db.student.drop()
true
> db.student.insert({"_id": 1, "name":"zhangsan", "age": 28})
WriteResult({ "nInserted" : 1 })
> db.student.find()
{ "_id" : 1, "name" : "zhangsan", "age" : 28 }
> db.student.insert({"_id": 1, "name":"zhangsan", "age": 27})
WriteResult({
"nInserted" : 0,
"writeError" : {
"code" : 11000,
"errmsg" : "E11000 duplicate key error collection: zyhdb.student index: _id_ dup key: { : 1.0 }"
}
})
> db.student.find()
{ "_id" : 1, "name" : "zhangsan", "age" : 28 }
> db.student.save({"_id": 1, "name":"zhangsan", "age": 27})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.student.find()
{ "_id" : 1, "name" : "zhangsan", "age" : 27 }

2、批量插入，網(wǎng)上的文檔都說不能MongoDB不支持批量插入，現(xiàn)在試過可以，應(yīng)該是目前的版本支持批量插入了。

> db.student.insert([{"_id": 2, "name": "lisi"},{"_id": 3, "name": "wangwu"}, {"_id": 4, "name": "zhaoliu", "age": 28}])
BulkWriteResult({
"writeErrors" : [ ],
"writeConcernErrors" : [ ],
"nInserted" : 3,
"nUpserted" : 0,
"nMatched" : 0,
"nModified" : 0,
"nRemoved" : 0,
"upserted" : [ ]
})
> db.student.find()
{ "_id" : 1, "name" : "zhangsan", "age" : 27 }
{ "_id" : , "name" : "lisi" }
{ "_id" : , "name" : "wangwu" }
{ "_id" : 4, "name" : "zhaoliu", "age" : 28 }

3、循環(huán)插入：

> for(var i=; i<; i++){db.fortest.insert({num: i})}
WriteResult({ "nInserted" : })
> db.fortest.find()
{ "_id" : ObjectId("eceadaeabab"), "num" : 0}
{ "_id" : ObjectId("eceadaeabab"), "num" : 1}
{ "_id" : ObjectId("eceadaeabab"), "num" : 2}
{ "_id" : ObjectId("eceadaeabab"), "num" : 3}
{ "_id" : ObjectId("eceadaeabab"), "num" : 4}
{ "_id" : ObjectId("eceadaeababa"), "num" : 5}
{ "_id" : ObjectId("eceadaeababb"), "num" : 6}
{ "_id" : ObjectId("eceadaeababc"), "num" : 7}
{ "_id" : ObjectId("eceadaeababd"), "num" : 8}
{ "_id" : ObjectId("eceadaeababe"), "num" : 9}

以上所述是小編給大家介紹的MongoDB快速入門筆記(三)之MongoDB插入文檔操作的相關(guān)知識，希望對大家有所幫助，更多精彩內(nèi)容，敬請關(guān)注腳本之家網(wǎng)站！

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