Read excel file and search in elastic search

I have a 20 millions rows student document in elastic search and I have excel file with 7000 rows that have students mobile number and I want to find all these students national No and students code in elastic search. I don't know how to read and search from a file.
Thanks a lot for any help

You will need an external process that reads your excel spreadsheet and updates your Elasticsearch documents accordingly. You will probably have to write it yourself, I don't know of a tool that could do this automatically.

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