How to add new column in the datatable

Hi all,
Currently I am working on the sample data that is provided by the kibana.

I want to display a new column in the datatable named "total_Hours". I want to add "Unique Visits (Total)" and "Unique Visits (Last Hour)" and display that column in the datatable.

any help in this regard will be highly appreciated.
Thank You

You can't do this in TSVB, but with a Lens datatable and formula it's achievable

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I am new to kibana..can you please elaborate it in detail.

Check out this guide: Create visualizations with Lens | Kibana Guide [8.3] | Elastic

Especially the " Use formulas to perform math" section

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I have reached at that point... now i want to add "Average of bytes" and "Top values of hour_of_day", I did not find the way. could you plz guide me regarding this.

Thank You

I think your version of Kibana is too old - once you upgrade to a recent version you should be able to create a new metric dimension, then use a formula like average(bytes) + last_value(hour_of_day)