Question

Hi I need help to understand what to do in this questions I have imported the file using mongodimport but I dont know the rest can someone please help me to understand and give me some examples of the way to make the commands to work.

To complete this step, type in the following Linux commands to perform the import in the right directory:

../startMongod.sh #first step will always be to start mongo

cd datasets/ #change into the directory with the datasets

mongoimport --db city --collection inspections ./city_inspections.json #mongo import utility

Using the mongoimport tool, load the database “city” with documents found in the “city_inspections.json” file into the “inspections” collection. Verify your load by issuing the following queries:

a. db.inspections.find({"id" : "10021-2015-ENFO"})

b. db.inspections.find({"result":"Out of Business"},{"business_name":1}).limit(10)

Answer 1

you say you have already imported the file now..
you can query the collection using mongodb shell in terminal

1) just open your terminal and enter command "mongo" it will open a mongo shell for you

2) after that type "use city" to work with city database

3) now you can directly type your quiries
a. db.inspections.find({"id" : "10021-2015-ENFO"})

it will display the result on terminal for you to see.. if you want the result to be in formatted and readable format
you can add .pretty() at the end of the query like..
db.inspections.find({"id" : "10021-2015-ENFO"}).pretty()

similarly for
b. db.inspections.find({"result":"Out of Business"},{"business_name":1}).limit(10)