Hi Subhojit Paul,
In the ExcelImporter Marketplace Module, you can find IVK_ImportTemplateDocument in the Example folder. If you would import data to a non-persistent Entity and retrieve it, you can use the data in a loop, for example, using the Database Connector https://marketplace.mendix.com/link/component/2888 to write it to any other database.
If you get stuck, contact me.
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