You can view an all_parameters table in dbsnake's blog. You can use this table to view hidden parameters. But I confirmed later that this table is not available. Therefore, this is a view created by dbsnake.
How to view Oracle parameter categories and Parameters
Http://blog.csdn.net/tianlesoftware/article/details/5583655
In the above blog, there is an SQL script for querying implicit parameters. Based on this script, a view named all_parameters is created. The function is implemented. It is much easier to use this view to view implicit parameters.
/* Formatted on2011/7/28 15:01:16 (qp5 v5.163.1008.3004 )*/
Create view all_parameters
As
Select I. ksppinm name,
I. ksppdesc description,
Cv. ksppstvl value,
Cv. ksppstdf isdefault,
Decode (bitand (cv. ksppstvf, 7 ),
1, 'modified ',
4, 'System _ mod ',
'False ')
Ismodified,
Decode (bitand (cv. ksppstvf, 2), 2, 'true', 'false') isadjusted
From SYS. x $ ksppi I, SYS. x $ ksppcv CV
Where I. inst_id = userenv ('instance ')
And cv. inst_id = userenv ('instance ')
And I. indx = cv. indx
And I. ksppinm like '/_ %' escape '/'
Order by Replace (I. ksppinm ,'_','');
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