MongoDB Installation and Basic Operation

MongoDB Installation and Basic Operation

1. Install

Enter / usr / local

cd /usr/local 

download

sudo curl -O https://fastdl.mongodb.org/osx/mongodb-osx-x86_64-3.4.2.tgz

Decompression

sudo tar -zxvf mongodb-osx-x86_64-3.4.2.tgz

Rename mongodb

sudo mv mongodb-osx-x86_64-3.4.2 mongodb

Configuration environment variable

export PATH=/usr/local/mongodb/bin:$PATH

2. Start

sudo mongodb

3. Basic Operation

Go to the bin directory, interact

cd /usr/local/mongodb/bin

./mongo

Create a database

use DATABASE_NAME

View all databases

show dbs

Create a collection (table)

db.createCollection(name, options)

Query existing collection (table)

show collections

Inserting data (JSON format)

newMsg collection insert data in the test database

sudo ./mongoimport --db test --collection newMsg --file ~/Desktop/ptapp/newMsg.json

Complement:

1. Insert or json format data files need to exit Mongo , returns to the bin directory operation

2. When importing data -collection corresponding set of name must -file consistent collection under the name of the path, otherwise the following error occurs, it is easily overlooked pit

error validating settings: incompatible options: --file and positional argument(s)

Query data

NewMsg table query on to: "p_u_b2dc9fe03d4d90" data:

db.newMsg.find({to: "p_u_b2dc9fe03d4d90"}).sort({ "_id": 1}).skip(0).limit(30)

db.newMsg.find({ "to":'p_u_b2dc9fe03d4d90'}).pretty()

Nested array of query

db.newMsg.aggregate([
    {$match: {"payload.bodies.msg": '付款了怎么反还？'}},
    {$unwind: "$payload"},
    {$unwind: "$payload.bodies"},
    {$match: {"payload.bodies.msg": '付款了怎么反还？'}},
]);
db.newMsg.aggregate([
    {$match: {"msg_id": '571378421368621020'}},
]);

Complement: This nested query directly, only to return, is to check the msg, then check in accordance with msg_id

Export data to be found in the specified file

-h  host
-p  端口号
-d  数据库名称
-c  表名称
-q  查询条件语句
~/  进入根目录

sudo ./mongoexport -h localhost -p 27017 -d test -c 2016 -q "{to: 'p_u_b1d692e437499f'}" -o ~/Desktop/findResult/from_2016.json

Delete collection (table)

db.createCollection.drop()

On here, more operations can directly view the MongoDB Tutorial