mongo-基本操作

mongo-基本操作

連接

mongo mongodb://user:pass@ip:port/db

root@c87416afb49d:/# mongo mongodb://root:root@localhost:27017

數據庫操作

查看數據庫

1. 查看所有數據庫

> show dbs
admin    0.000GB
config   0.000GB
local    0.000GB
mybatis  0.000GB

2. 查看當前數據庫

> db
mybatis

3.創建數據庫

user databaseName # database沒有則創建

> use test
switched to db test
> show dbs   # 剛創建時看不見test,需要向test數據庫中插入數據 
admin    0.000GB
config   0.000GB
local    0.000GB
mybatis  0.000GB

> db.test.insert({name:'test'})
WriteResult({ "nInserted" : 1 })
> show dbs
admin    0.000GB
config   0.000GB
local    0.000GB
mybatis  0.000GB
test     0.000GB

3. 刪除數據

db.dropDatabase()

> db.dropDatabase()
{ "dropped" : "test", "ok" : 1 }
> show dbs
admin    0.000GB
config   0.000GB
local    0.000GB
mybatis  0.000GB

集合操作

1. 創建集合

db.createCollection(name, options)

> db.createCollection("users")
{ "ok" : 1 }
> show collections
message
users

2. 查看集合

show collections

3. 刪除集合

db.collection.drop()

> db.users.drop()
true
> show collections
message

文檔

插入文檔

db.COLLECTION_NAME.insert(document) 或 db.COLLECTION_NAME.save(document)

> db.users.insert({name:'mongo', version:'1.0'})
WriteResult({ "nInserted" : 1 })

刪除文檔

method	desc
db.collection.deleteOne()	僅僅只刪除一個，儘管匹配了多個
db.collection.deleteMany()	刪除多個
db.collection.remove()	刪除單個或者全部

> db.users.remove({})
WriteResult({ "nRemoved" : 1 })
> db.users.find().pretty()

更新文檔

 db.collection.update(
        `<query>`,
        `<update>`,
        {
            upsert: <boolean>,
            multi: <boolean>,
            writeConcern: <document>
        })

根據 name 更新

> db.users.update({name:'mongo'},{$set:{time:'hello'}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.users.find({}).pretty()
{
	"_id" : ObjectId("5ef5b146641d4353f5d4cee5"),
	"name" : "mongo",
	"version" : "1.0",
	"time" : "hello"
}

查詢文檔

db.collection.find(query)

> db.users.find({}).pretty()
{
	"_id" : ObjectId("5ef5b146641d4353f5d4cee5"),
	"name" : "mongo",
	"version" : "1.0"
}