DynamoDB vs MongoDB NoSQL [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be … Read more
mongodb
Find duplicate records in MongoDB
How would I find duplicate fields in a mongo collection. I’d like to check if any of the “name” fields are duplicates. { … Read more
How to change the type of a field?
I am trying to change the type of a field from within the mongo shell. I am doing this… db.meta.update( {‘fields.properties.default’: { $type … Read more
How to remove array element in mongodb?
Here is array structure contact: { phone: [ { number: “+1786543589455”, place: “New Jersey”, createdAt: “” } { number: “+1986543589455”, place: “Houston”, createdAt: … Read more
What is BSON and exactly how is it different from JSON?
I am just starting out with MongoDB and one of the things that I have noticed is that it uses BSON to store … Read more
MongoDB: Find a document by non-existence of a field?
Is there a way to specify a condition of “where document doesn’t contain field” ? For example, I want to only find the … Read more
Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
How to I get mongo to use a mounted drive on ec2? I really do not understand. I attached a volume on ec2 … Read more
MongoDB logging all queries
The question is as basic as it is simple… How do you log all queries in a “tail”able log file in mongodb? I … Read more
mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
I tried mongo replica sets for the first time. I am using ubuntu on ec2 and I booted up three instances. I used … Read more
MongoDB: How to find the exact version of installed MongoDB
I have mongoDB 3.2 installed locally for Windows 7. I would like to find out its specific version (like is it 3.2.1, or … Read more