Save Data in the background

Hi everyone,

in my app I have to create a table with approx. 30-50 columns and up to 3000 rows. Most data I have to store in the background only for calculations (after calculating I need to write the new values into the table), only a few data I have to show later in the app.

In my first try I used Excel to store the data and it worked but I struggled with it. Now I am asking myself if there is a easier and/or better way (e.g. SQL?). What would you recommend to me?

Thanks in advance!

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