Inserting Document/Record in MongoDb's Collection/Table

Ways To Insert Document

• 
  MongoDB provides mainly 3 types of insert methods for inserting documents into a collection those are:
  

  sno	Method	Description
  1	insert()	inserts a single document or multiple documents into a collection
  2	insertMany()	Inserts multiple documents into a collection.
  3	insertOne()	inserts a single document into a collection and returns the status of the operation

insert() Syntax and Example

• db.CollectionName.insert(
  document or array of documents of bson/json form,
  {
       writeConcern: <document>,
       ordered: <boolean>
     }
  )
  
  

  Here ordered:true preserves order of insertion default it is false. Example:-

   >db.users.insert({userid:"Alex",Age:25,gamesplayed:["Rummy","TeenPati"]})

  Output:-

   Inserted 1 record(s) in 1ms

  Here we are inserting a record/document into games collection. To view the record of above, use this command

   db.users.find().pretty()

  then we will get this output
  

  {
      "_id" : ObjectId("5774adbcfc520de27ab8744e"),
      "userid" : "Alex",
      "Age" : 25.0,
      "gamesplayed" : [ 
          "Rummy", 
          "TeenPati"
      ]
  }
  
  

  
  In the above output _id is automatically generated by MongoDB if we want to override with our custom value we can but _id is must be unique. For more details on _id check this

insertMany() Syntax and Example

• Syntax: - db.CollectionName.insertMany
  ([document1, document2,…],
  {
       writeConcern: <document>,
       ordered: <boolean>
    }
  )
  

  Here ordered:true preserves order of insertion default it is false.
  
  Example :-
  

  >db.users.insertMany([
      {userid:"Anderson",Age:40,gamesplayed:[],totalbet:0,totalwin:0},
      {userid:"McGraw",Age:45,gamesplayed:["Cricket","Rummy"],totalbet:1000,totalwin:15000,isOnline:false}
    ])
  

  Output:-

  {
      "acknowledged" : true,
      "insertedIds" : [ 
          ObjectId("5773aa2fe2b90fd312b1c480"), 
          ObjectId("5773aa2fe2b90fd312b1c481")
      ]
  }
  

  Here we are inserting multiple records at a time.

insertOne() Syntax and Example

• it will inserts one record similar to insert() method but it will acknowledge objectId of the inserted document whereas insert() won’t.

  Syntax: -

  db.CollectionName.insertOne
  (document,
  {
       writeConcern: <document>,
    ordered: <boolean>
    }
  )
  

  Here ordered:true preserves order of insertion default it is false.
  Example :-

  >db.users.insertOne({userid:"Cock",Age:45,gamesplayed:["Cricket","Teenpati"],totalbet:1000,totalwin:15000,isOnline:true})
  

  Output:-

  { "acknowledged" : true,
  "insertedId" : ObjectId("5773ab7ae2b90fd312b1c483")
  }

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