SQL> -- COMPOSE(x):Converts x to a Unicode string in its fully normalized form in the
same character set as x.
SQL>
SQL> select compose('o' || unistr('\0308') ) from dual;
C
-
SQL>
SQL> select compose('a' || unistr('\0302') ) from dual;
C
-
SQL> select compose('e' || unistr('\0301') ) from dual
2
SQL>
SQL>