abc-notepedia

# MongoDB - Basics

# Installation

Install MongoDB Community Edition. It is the non-commercial edition, but has all the features we need.

Follow the installation instructions of your operating system:

https://docs.mongodb.com/manual/administration/install-community/ (opens new window)

brew tap mongodb/brew
brew install mongodb-community@4.2

Mac:

mongod --config /usr/local/etc/mongod.conf

# mongod

-> Software, Server. Running in background

# start server:

mongod

https://docs.mongodb.com/manual/tutorial/manage-mongodb-processes/ (opens new window)

# stop server

./mongo

use admin

db.shutdownServer()

# mongo-shell

# start the mongo command line tool:

mongo

>_

# Show the Database

db

# Show the Databases

show dbs

admin, config, local = default

# Switch to Other Database

use databaseName

****If the database does not exist, mongo will create it for you.

(to get listed with show dbs, it has to have some content)

# Collections and Documents

In MongoDB, your data is organized in collections. (equivalent to a table in relational databases)

A document is a data item stored in a collection. It is the equivalent of a row in a table in relational databases.

Data is stored in JSON (JavaScript Object Notation) format

# Show Collections

show collections

collection = table

document = datensatz

# CRUD

https://docs.mongodb.com/manual/crud/ (opens new window)

Create - MongoDB →