Joining Multpile CSV files and injecting the data into Elasticsearch

Hello All,

I am sure that you cant use "joins" in Kibana. I have a task which has to combine 3 csv files and inject the data into a single index on kibana. What are the different ways to solve this problem?
I would appreciate any sort of help in this.

Thanks

You will probably get more responses if you open this under the Logstash category.