How do I show collections in MongoDB?

How do I show collections in MongoDB?

1. connect with the MongoDB database using mongo . This will start the connection.
2. then select the database you want. In the above it is anuradhfirst . Then run use anuradhfirst . This will switch to the database you want.
3. then run show collections command. This will show all the collections inside your selected database.

How do I find collection index in MongoDB?

To view a list of all indexes on a collection in MongoDB Compass, click on the target collection in the left-hand pane and select the Indexes tab. For details on the information displayed in this tab, refer to the Compass documentation.

How do I show all databases in MongoDB?

7 Answers. Listing all the databases in mongoDB console is using the command show dbs .

Where is unused index in MongoDB?

Finding Unused Indexes in MongoDB

1. db.collection.aggregate([{$indexStats: {}}, {$match: {“name”: “<indexname>”}}])
2. db.collection.aggregate([{$indexStats:{}}])
3. { “name” : “test”,
4. db.collection.dropIndex( “<index name>”)  or. db.collection.dropIndex(“{key1:1…..

What does a MongoDB collection consist of?

A document is a representation of a single entity of data in the MongoDB database. A collection consists of one or more related objects. A major difference exists between MongoDB and SQL, in that documents are different from rows. Row data is flat, with one column for each value in the row.

How do I access MongoDB data?

You can access MongoDB via the MongoDB Shell, or from within your programming environment using a MongoDB driver. Once you have started a MongoDB instance (i.e. by using the mongod command), you can now connect to that instance and start working with MongoDB.

What is DB collection?

A collection is the equivalent of an RDBMS table. A collection exists within a single database. Collections do not enforce a schema. Documents within a collection can have different fields. Typically, all documents in a collection have a similar or related purpose.