How to append a character using UTL_FILE pkg

Question

A table with student_id, student_name and date_of_join.
create table student(std_id varchar2(10),std_name varchar2(20),std_doj date);I am loading the data from the below flat file using UTL_FILE package
101   ron   04081999
101   ron   01081996
102   ram   05082000
102   ram   12101999
103   fin   06082001
104   gin   07082002
105   gem   08082003I am using a procedure to load the data into table using UTL_FILE package
Students with id's 101 & 102 have two joining dates as they have registered for two courses. In flat file there is no change in std_id but I have to append a character "C" to those who have registered for the second course.
I have to append a character to std_id column. for eg: After loading the result what I am expecting is
std_id          std_name          std_doj
101          ron               04081999
101C          ron               01081996
102          ram               05082000
102C          ram               12101999
103            fin                06082001
104             gin               07082002
105             gem               08082003          Can you please give me an idea on how to get the above result using UTL_PACKAGE in the procedure?

Answer 1

It has nothing to do with UTL_FILE. In your load procedure you are looping through the file line by line, right? SO you need to :
DECLARE
    prev_std_id number;
BEGIN
    LOOP
      read a line
      parse it into std_id, std_name and std_doj
      IF std_id = prev_std_id
        THEN
          std_id := std_id  || 'C';
        ELSE
          prev_std_id := std_id;
      END IF;
      insert row
    END LOOP;
END;SY.