Hello rama krishna thota.
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Do you know the location of the CSV file? (If it belongs to your App, it should be in the ASD.)
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You can use the File Blocks to load the CSV content into your App programmatically (Button Click to start the process). PHP not required.
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Having loaded the CSV data, it can be used to update your SQL database.
There is a lot of information on the forum about handling databases. See this recent Topic for example:
(ignore the posts about Airtable)