A question on how oracle can read excel file?

Hello techyv,
A question on how oracle can read excel file? Does oracle database read excel file data such as .xls file format? What if we need to import some excel file in a specific database is there a way that we can open or read the file using oracle database? Just for example in my website, if I upload and download excel file formats. I need your advice.
Expecting some help from you guys. Thank you.
