How to views all documents in a particular collection of database in MongoDB through mongo Shell?

In the MongoDB shell, how to views all documents in a particular collection for the current database that I'm using?

when i am trying through the query

> db.getCollection().find()

To getting the error as mention below

2017-10-14T00:57:34.363+0530 E QUERY    [thread1] Error: collection constructor called with undefined argument :
DB.prototype.getCollection@src/mongo/shell/db.js:34:16
@(shell):1:1

I am also uploading the screen shot of mongo shell command prompt here

OK, let's start from basics!

After you have connected to mongod with command mongo.

• List databases with command show dbs

iot:PRIMARY> show dbs
admin 0.000GB
iot 0.020GB
local 0.042GB
test 0.000GB
testi 0.000GB


• Select one of the DB's with use iot command

iot:PRIMARY> use iot

switched to db iot

• List collections on that DB with show collections command

iot:PRIMARY> show collections
data
header
key


• Make query to one of those collections

iot:PRIMARY> db.header.find()
{ "_id" : "1b5caa", "temp1" : "Temperature", "pressure1" : "Pressure", "humidity1" : "Humidity", "uv1" : "UV", "BusV1" : "Solar Panel (V)", "Current1" : "Solar Panel Current (mA)", "BusV2" : "Battery (V)", "Current2" : "Battery Current (mA)" }
{ "_id" : "30444", "temp1" : "Temperature", "pressure1" : "Pressure", "humidity1" : "Humidity" }
{ "_id" : "239684", "temp1" : "Temperature", "pressure1" : "Pressure", "humidity1" : "Humidity" }


So, you need to be connected WANTED database with use command and you need to show the one collection what you want to query with db..find()

How to see to what database I'm connected currently? Just give command db and you get the answer what is your current DB.

StackExchange Database Administrators Q#188441, answer score: 13