List All Hidden Database Parameters

SET PAGESIZE 60
SET LINESIZE 300

COLUMN ksppinm FORMAT A50
COLUMN ksppstvl FORMAT A50

SELECT
ksppinm,
ksppstvl
FROM
x$ksppi a,
x$ksppsv b
WHERE
a.indx=b.indx
AND
substr(ksppinm,1,1) = '_'
ORDER BY ksppinm;