MongoDB Compass is a GUI application which manages the NoSQL, in particularly, MongoDB.

Compass is similar to PhpMyAdmin, Navicat, Jetbrains Datagrip

1) Installation

• Download Compass from the MongoDB Download Center . If you have already installed Compass then please make sure you are using the latest (Stable) version of Compass and upgrade if necessary. Please ensure you don't download the "Community Edition Stable" version.
• Install and Launch

2) Connect to a sample database

When Compass opens you will see a page titled "Connect to Host".

1. Use the following information to complete this form, but do not click "Connect" yet.
2. Hostname: cluster0-shard-00-00-jxeqq.mongodb.net
3. Username: m001-student
4. Password: m001-mongodb-basics
5. Replica Set Name: Cluster0-shard-0
6. Read Preference: Primary Preferred
7. Click "Add to Favorites" and enter M001 RS as the Favorite Name. Adding this connection as a favorite will enable you to easily reconnect to our class MongoDB deployment after closing and restarting Compass.
8. Now, click "Connect" and load the databases in the M001 class MongoDB deployment.

You will see something like this.

The left pane contains the information of the cluster and version, followed by the list of databases in this cluster.

The right pane is the table displaying the databases inside this cluster, as well as their sizes, number of collections and indexes.

3) Inside database and collection

We click on citybike database, Compass will show all collections inside this database. In this example, citybike database only contains one collections named trips.

Click on trips collection, you can see there are many tabs inside it. In this article, I only mention Documents and Schema tabs

3.1) "Document" tab

• Show all documents in pretty JSON format. You can expand and collapse each nested document inside a document.
• The default view is LIST. You can see documents in TABLE view
• You can have some operations when hovering one document. They show in the right side, which includes Edit, JSON copy, Clone and Delete.

• You can filter the result by specifying some constraints in the Filtering Box. Thus, the result only shows the documents matching the filter.
• The filtering format is JSON
• For more about filtering, please see MongoDB Query Language

3.2) "Schema" tab

This tab show the structure of the collection with left pane and right pane. Notably, the displayed content is after filtered.

• The left pane shows the fields and their data types of filtered result. Because NoSQL allows one field can have many data types and one field can encompass other nested documents, you can see cast field has array type, string type, and undefined type in the example below.
• The right pane shows the information of the data stored in each field. Based on data types, Compass displays relevant details about them, for example, data sample or visualisation or distribution.