create table dept( 
dept_no varchar2(15), 
dept_name varchar2(30), 
loc varchar2(30))

insert into dept values ('10','president's','washington d.c')

DECLARE 
l_sql VARCHAR2(32767); 
BEGIN 
  l_sql := 'INSERT INTO DEPT VALUES ('; 
  L_sql := l_sql || '''50'''; 
  l_sql := l_sql ||', ''president''s'', ''washington d.c'')'; 
  dbms_output.put_line(l_sql); 
  EXECUTE IMMEDIATE l_sql; 
END;

select * from v$version