load data by creating tables

I have over 50,000 files  let say

tyep1. co1,co2,co3,co4 etc number of files 10,000

           int, int, char, int

some of files has header only and details are blank

type2:  co1,co2,co3,co4 etc number of files 30,000

          char,char,init,date,date, etc

over 50 table types.

create a table for each table type on oracle is  time consuming . each text files  has lot of columns. Any how to load the data to oracle by creating table with understanding data type  based on  text file.

Appreciate any feedback.