oracle get nls settings
SELECT *
FROM (SELECT 'SESSION' SCOPE, nsp.* FROM NLS_SESSION_PARAMETERS nsp
UNION ALL
SELECT 'DATABASE' SCOPE, ndp.* FROM NLS_DATABASE_PARAMETERS ndp
UNION ALL
SELECT 'INSTANCE' SCOPE, nip.* FROM NLS_INSTANCE_PARAMETERS nip) a
PIVOT (listagg(VALUE) WITHIN GROUP (ORDER BY SCOPE) FOR SCOPE IN (
'SESSION' AS "SESSION" ,'DATABASE' AS DATABASE ,'INSTANCE' AS INSTANCE));
-- ⇓ Test it ⇓ (Fiddle source link)