javascript - mongoDB query using $match and $group (filter last 24 hours logged data and group with id and count)

Question

what I am trying to do is, filter only last 24 hour logs and group by userId and count how many time it logged

here is my mongoDB collection's schema

Key	Type
timestamp(ISODate)	Date
...	...
transactionLogs_docs	Array
????- [0]	Object
????????- userId	String
????????- ...	...

Answer 1

Put $match before $group stage