DaniiNyan

• How many zips in the sample_training.zips dataset are neither over-populated nor under-populated? In this case, we consider population of more than 1,000,000 to be over- populated and less than 5,000 to be under-populated.

db.zips.find({
              $nor: [
                { pop: { $gt": 1000000 } },
                { pop: { $lt: 5000 } }
              ]
 }).count()

DaniiNyan

Basic

• Connect to mongo:

mongo "<Atlas Cluster URI>"

• List all databases:

show db

DaniiNyan

Import database:

• JSON:

mongoimport --uri "<Atlas Cluster URI>"
            --drop=<filename>.json

• BSON:

mongorestore --uri ""