Using only iPhone 6P to convert sms.db to .csv or .xls

I can not find a way to convert sms.db to an xls or csv file, only using my jailbroken iPhone. Id like to take my messages backup, and make it readable. Only problem is I don't have a computer. Just a jailbroken iPhone. Any ideas or help? Seems the only options are to use a pc or Mac. Thanks.