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//The insert() Method
db.COLLECTION_NAME.insert(document)
//e.g.
//Here mycol is our collection name, as created in the previous chapter. 
// If the collection doesn't exist in the database, then MongoDB will create this collection and 
//then insert a document into it.
//In the inserted document, if we don't specify the _id parameter, 
//then MongoDB assigns a unique ObjectId for this document.
//_id is 12 bytes hexadecimal number unique for every document in a collection.
//12 bytes are divided as follows −
db.mycol.insert({
   _id: ObjectId(7df78ad8902c),
   title: 'MongoDB Overview', 
})

//insert multiple
db.post.insert([
   {
      title: 'MongoDB Overview', 
      description: 'MongoDB is no sql database',
   },
	
   {
      title: 'NoSQL Database', 
      description: "NoSQL database doesn't have tables",
      by: 'tutorials point',
      url: 'http://www.tutorialspoint.com',
      ]
   }
])