Add (padding) a specified set of characters to the right of the original string.
RPAD stands for "right pad." The general format for this function is:
RPAD(string, length_to_make_string, what_to_add_to_right_of_string)
SQL> SELECT RPAD('Letters', 20, '.') FROM dual;
RPAD('LETTERS',20,'.
--------------------
Letters.............
SQL>