set serveroutput on
set pagesize 9999
set linesize 155
var name varchar2(50)
accept sql_id -
       prompt 'Enter value for sql_id: ' 

BEGIN

select address||','||hash_value into :name
from v$sqlarea 
where sql_id like '&&sql_id';

dbms_shared_pool.purge(:name,'C',1);

END;
/

undef sql_id
undef name