What is the syntax we write in command line after we initialize Mongo EXE to create a collection and to drop a collection in MongoDB?

Method 1: Creating the Collection in MongoDB on the fly With a single command you can insert a document in the collection and the MongoDB creates that collection on the fly. Syntax: db. collection_name. insert({key:value, key:value…})

What is the syntax to create a collection?

Syntax. In the command, name is name of collection to be created. Options is a document and is used to specify configuration of collection. (Optional) If true, enables a capped collection.

What syntax does MongoDB use?

Structuring Document Data MongoDB documents are formatted in BSON (an extended Binary form of JSON) , which allows you ultimate flexibility in structuring data of all types.

What is the syntax to create a collection and drop a collection in MongoDB?

Example of Create Collection in MongoDB

1. db. dataflair. insert({
2. db. createCollection(name, options) db.createCollection(name, options)
3. >use dataflair. switched to db dataflair. >db.
4. >show collections. mongodb. >show collections mongodb.
5. db. collection_name. drop()
6. >use dataflair. Switched to db dataflair.
7. >db. mongodb.

What is collection in MongoDB?

A collection is a grouping of MongoDB documents. Documents within a collection can have different fields. A collection is the equivalent of a table in a relational database system.

What is DB in MongoDB command?

MongoDB use DATABASE_NAME is used to create database. The command will create a new database if it doesn’t exist, otherwise it will return the existing database.

Which command is used to create a collection?

For example, you use db. createCollection() to create a capped collection, or to create a new collection that uses document validation. db. createCollection() is a wrapper around the database command create .

How do I create a collection in MongoDB?

MongoDB creates collections automatically when you insert some documents. For example: Insert a document named seomount into a collection named SSSIT. The operation will create the collection if the collection does not currently exist. If you want to see the inserted document, use the find() command.

How do I query a collection in MongoDB?

To query data from MongoDB collection, you need to use MongoDB’s find() method.

What Is syntax for index in MongoDB?

MongoDB provides a method called createIndex() that allows user to create an index. Syntax – db.COLLECTION_NAME.createIndex({KEY:1}) The key determines the field on the basis of which you want to create an index and 1 (or -1) determines the order in which these indexes will be arranged(ascending or descending).

Which of the following is the correct syntax for getting the list of indexes on a particular collection in MongoDB?

Syntax. The basic syntax of createIndex() method is as follows(). Here key is the name of the field on which you want to create index and 1 is for ascending order. To create index in descending order you need to use -1.

How do I create a collection in MongoDB compass?

In MongoDB Compass, you create a database and add its first collection at the same time: Click Create Database to open the dialog. Enter the name of the database and its first collection. Click Create Database.

What is the use of createcollection in MongoDB?

db.createCollection (name, options) ¶ Creates a new collection or view. For views, see also db.createView (). Because MongoDB creates a collection implicitly when the collection is first referenced in a command, this method is used primarily for creating new collections that use specific options.

How to delete a document from a collection in MongoDB?

Let’s insert a document into the books collection: We can remove any document from the collection using the delete command. There is multiple delete specification in a single delete command. We cannot use it on the capped collection. The delete command is internally used by the removal method, which is provided by the MongoDB.

What are the basic commands of MongoDB?

Basic of MongoDB Commands 1 Create Database. In MongoDB use, DATABASE_NAME is used to create a database. 2 Drop Database. If the database is not specified, then it will delete the default database that is “test”. 3 Create Collection. 4 Drop Collection 5 Insert Document. 6 Query Document.

How to insert elements in MongoDB using insert method?

The insert method uses the insert command internally, which is provided by MongoDB. documents: [ , , , ], It is the name of the collection where we want to insert the element. It is a document that defines the write concern of insert command.