Top Answers

1. Mongodb query to Count days between two dates of each document
   10 votes
2. MongoDB aggregation $or with $elemMatch, $expr inside $lookup pipeline
   5 votes
3. mongoClient.connect VS mongoose.connect in MongoDB
   5 votes
4. MongoDB - Split an array into several multiple docs & replace existing doc with array's objects
   5 votes
5. Extract only value in key value pair in $project in mongodb aggregate
   5 votes