mongodb数据操作(CRUD)

1.数据插入
db.集合名.insert()

操作

> use hk
switched to db hk
> show collections
> db.info.insert({"url":"www.lepu.cn"})
WriteResult({ "nInserted" : 1 })
> db.info.find()
{ "_id" : ObjectId("592bd4324c964b7784cca90f"), "url" : "www.lepu.cn" }

数组插入

db.info.insert([
        {"url":"www.baidu.com"},
        {"url":"www.9888.cn"},
        {"url":"www.a.cn"}
]);

操作

> db.info.insert([
... {"url":"www.baidu.com"},
... {"url":"www.9888.cn"},
... {"url":"www.a.cn"}
... ]);
BulkWriteResult({
        "writeErrors" : [ ],
        "writeConcernErrors" : [ ],
        "nInserted" : 3,
        "nUpserted" : 0,
        "nMatched" : 0,
        "nModified" : 0,
        "nRemoved" : 0,
        "upserted" : [ ]
})
> db.info.find()
{ "_id" : ObjectId("592bd4324c964b7784cca90f"), "url" : "www.lepu.cn" }
{ "_id" : ObjectId("592bd4f84c964b7784cca910"), "url" : "www.baidu.com" }
{ "_id" : ObjectId("592bd4f84c964b7784cca911"), "url" : "www.9888.cn" }
{ "_id" : ObjectId("592bd4f84c964b7784cca912"), "url" : "www.a.cn" }

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