What is a CSV file?
CSV file, also known as comma separated values file, that stores data in a table structured format. Files have a .csv extension. Design of the CSV file looks like a spreadsheet, values in columns are separated by a comma from other values arranged in columns.
Microsoft Excel, Open Office Calc or another spreadsheet program can read and work with CSV file. Compared to Excel file, in CSV file is user able to create just one sheet or there is not an option to style a row.