Mega Code Archive
Use dbms_lob writeappend to append value to clob type value
SQL>
SQL> declare
2 l_clob clob := '12345';
3 begin
4 dbms_lob.writeappend( l_clob, 5, 'ABCDEFGHIJK' );
5 dbms_output.put_line( l_clob );
6 end;
7 /
12345ABCDE
PL/SQL procedure successfully completed.
SQL> --