HACKABILITY

This post is a cheat sheet for MongoDB. This cheat sheet is not technical, maybe you can use this when you cooking. # Find all data in collectionUsage:db.collection.find({}) # Find if it has specific keySyntax: $exists{: {$exists: }} Usage:db.collection.find({"field": {"$exists": true}}) Reference:http://docs.mongodb.org/manual/reference/operator/query/exists/ # Delete Key ( $unset )Syntax: $uns..