This code is working with mongoDB Version 2.2.3
So Pleae install this version and check your db
First Perform following command
show dbs
use mydb
show collections
when you perform these three command then you will see list of collection for mydb
then perform
db.emails.find() which will give you will get Record
Here below i have paste command that i have fire it and check it dear
C:\dhananjay\mongoDB\mongodb\bin>mongo.exe
MongoDB shell version: 2.2.3
connecting to: test
> show dbs
blog 0.203125GB
course 0.203125GB
local (empty)
m101 0.203125GB
mydb 0.203125GB
school 0.203125GB
students 0.203125GB
test 0.203125GB
> use mydb
switched to db mydb
> show collections
emails
system.indexes
> db.emails.find()
{ "_id" : ObjectId("51a83f22fdb3f79d6a713e71"), "email" : "[email protected]" }
{ "_id" : ObjectId("51a83f22fdb3f79d6a713e72"), "email" : "[email protected]" }
{ "_id" : ObjectId("51a83f22fdb3f79d6a713e73"), "email" : "[email protected]" }
{ "_id" : ObjectId("51a83f22fdb3f79d6a713e74"), "email" : "[email protected]" }
{ "_id" : ObjectId("51a83f22fdb3f79d6a713e75"), "email" : "[email protected]" }