mongdb

How things were done first of all created the code space

one of the best feature that I think the internet has they are providing this much of free services to the world and yet people think shivilery is dead no sir not at all

After that few simple command to run

press F1 in the search bar type dev and select the first option saying add dev container config file this is basically the environment setting of the whole project

after that

Select create a new one
search for node and Mongo select the version default things for the last don't select anything and hit ok

npm init -y

you will have the option mongodb like thing opening infront of you just got to forms sect the right side one and connect database it will start the thingi

after that install the mongoose and express

npm i mongoose express

After that

setting up the system insdie the github code space to understand how things work their

Mouse is not working properly and database were created from the terminal using commands like

show dbs

but first make sure to run the database

the below command will create a database if not exist and if does then simply move switch to that one

use databaseName

To create a simple collection inside the respective databse but need to be in that databse first

db.createCollection("NameIt")

Now to drop a databse

db.dropDatabase("YourDatabaseName")

To iNsert objects into the collection created use the commands below

db.UserCredentials.insertOne({name: "theName", age:23, gpa:3.4})

To insert many Set of objects at a time useing the command called insertMany first need to be in the databse use mood or thing like that

db.CollectionName.insertMany([{name:"temp", age:34, gpa:3.4}, {object: "NeedNot To be COnsistent", age:2}])

to check the object use command

db.collectionName.find()

to show the objects from specific collection in some sorted manner using following code

db.CollectionName.find().sort({name:1})

same goes for the limit thing

db.CollectionName.find().limit(3)

And Yes both these can be used

db.CollectionName.find().sort({age:1})limit(3)

here is how you add filter to the method of find two parameters are send to the funtion first the query second the projection find({query}, {projection})

query is the if else thingi project will give the values that are true and hide the one's that are false like in the case below the object _id that is default with them

db.UserCredential.find({age:3},{_id:false,name:true})

Operators

THE NOT EQUAL operator for comparison

db.CollectionName.find({name:{$ne: "TheName"}})

this will give the objects inside the collection that have a name not equal to the name given

in tha same way the gt is used for greater than operation and for greater than equal gte is used

*** The in operator or what ever it is called is basically is in ***

db.CollectionName.find({name:{$in:["Set of","Name You ","Want to Get"}})

*** same could be done for not in using nin ***