Day 5 : Create document in MongoDB

1. Create database in mongodb
2. Create collection in mongodb
3. Create document in mongodb
4. query document in mongodb
5. update document in mongodb
6. Projections in mongodb
7. Sort records in mongodb
8. Delete document in mongodb
9. drop collection in mongodb
10. drop database in mongodb

In this part of the Learn Mongo Series, we will learn how to create a document in mongodb.

MongoDB is an Document oriented database where data is stored in the form of documents. So we can insert the data into a document using the db.Collection_name.insert() Method as shown below :

1. Single Insert : Inserting Single document using insert() command is shown below :
   

   											
   >use demo_db
   switched to db demo_db
   >db.demoCollection.insert([
    > db.details.insert([
   ... {
   ... name : 'nodejsera',
   ... age : '10',
   ... description : 'Mongodb tutorial series'
   ... }])
   >
   
   											
   										

   
   
2. Multiple Insert : Inserting multiple documents using insert() command is shown below :
   

   											
   >use demo_db
   switched to db demo_db
   > db.details.insert([
   ... {
   ... name : 'nodejsera',
   ... age : '10',
   ... description : 'Mongodb tutorial series'
   ... },
   ... {
   ... name : 'a',
   ... age : '11',
   ... description : 'learn mongodb'
   ... },
   ... {
   ... name : 'b',
   ... age : '12',
   ... description : 'something '
   ... }])
   >
   
   											
   										

   
   

MondoDb will automatically assign each document an unique _id . It is a 12 bytes hexadecimal number unique for every document in a collection. It is generated via keeping the following format in :
_id: ObjectId(4 bytes timestamp, 3 bytes machine id, 2 bytes process id, 3 bytes incrementer)

Hurray !! Mission Accomplished. We have successfully Created the document and inserted data into it.

In this part of learn mongo series , we learned about how we can remove documents from mongodb collection. We learned the following commands of mongodb :

1. use : This command is use to either create a new database or switch to an already existing database.
2. db.Collection_name.insert() : This command is used to insert documents in the mongodb collection.