HI,
i want to create create a custom user defined aggregation function in mongo db how to do it??
HI,
i want to create create a custom user defined aggregation function in mongo db how to do it??
Hi @anubhav_tarar,
Welcome to MongoDB community.
I think you are looking for $function or $accumulator:
https://docs.mongodb.com/manual/reference/operator/aggregation/function/
Those are available from 4.4 .
Otherwise there is a mapReduce command
Thanks
Pavel
This topic was automatically closed 5 days after the last reply. New replies are no longer allowed.