title: Reading multiple csv files into SAS datasets
body: <p>I have the following csv files and I need to read them into SAS datasets.
  Also, I need to assign column names. 
  In addition, I need the column to be numberic but some columns have both number and character values.</p>
  
  <p>folder aa:   abc1.csv, abc2.csv, abc3.csv,......
  folder bb:  abc1.csv, abc2.csv, abc3.csv,......
  folder cc:    abc1.csv, abc2.csv, abc3.csv,......</p>