tony@ORCL1> create table tmp(id int, val int);

Table created.

tony@ORCL1> declare v int; begin insert into tmp values(1,1); select max(val) into v from tmp; end;
  2  /

PL/SQL procedure successfully completed.

------解决方案--------------------
declare  
 v_id number(2);
 v_name varchar2(3);
 v_sql varchar2(256);
begin

select max(ID) into v_id from TableName;

v_name := 'xxx';

v_sql := 'insert into TableName(ID,MYNAME) values (:1,:2)';
execute immediate v_sql using v_id,v_name;
commit;
end;