Hello,

I would like to know, what is the best way to store data in databases (e.g. is it better to use XLSX, CSV or SQL?).
I would like to store appr. 100k - 400k records to one database (step by step).
Appr. weekly once the different (not predefined) queries could be needed.
What are the adventages and disadventages of the possible solutions?

Thank you.