col "Parameter" FOR a50
col "Session Value" FOR a15
col "Instance Value" FOR a15

SELECT a.ksppinm "Parameter",
b.ksppstvl "Session Value",
c.ksppstvl "Instance Value"
FROM x$ksppi a, x$ksppcv b, x$ksppsv c
WHERE a.indx = b.indx AND a.indx = c.indx
AND SUBSTR(ksppinm,1,1)='_'
AND LOWER(a.ksppinm) LIKE LOWER('%&param%')
ORDER BY a.ksppinm;

ALTER SYSTEM SET "&param." = VALUE scope = &scope. ;

ALTER SYSTEM reset "&param." scope=spfile SID='*';