String pdf="file.pdf";
            String bf ="file.exe";
            String if ="file.png";
        	
	    //how to load Files to save in mysql?;
            
            sql.Begin();
            String st="INSERT INTO test ";
            st += "(PDF,BF,IF)";
            st += " values (?,?,?)";  
            sql.Execute ( , , );
            sql.Commit();


            String st="select * from test ";
            sql.Execute (st);
            while ( sql.Fetch() )
            {
                ? SQL["PDF"]
                ? SQL["BF"]
                ? SQL["IF"]	
             }            

            //how to write content in files ?
              SaveFile(fpdf,?); 
              SaveFile(fbf,?); 
              SaveFile(fif,?);