Answers needed for my questions

Question

Hello,
I need answers for few questions.It helps me a lot.It may be very basics but kindly answer me.
)How do you view the value of the parameter that is being used by instance?
show parameter..?
2)How do you get the information of hidden parameters
3)What is the database object that stores information related to various types of db connections over network
4)How do you verify since when the db session is running
5)How do you verify the Originating machine details of the database session
6)How do you verify the name of program that the db session is running
7)What is the naming convenion of Base tables. Where is the information of base tables stored?
8)How are dynamic views created. Whre is the information of dynamic views stored?
Kindy tell me.
Thanks,
928714.

Answer 1

928714 wrote:
Hello,
I need answers for few questions.It helps me a lot.It may be very basics but kindly answer me.
)How do you view the value of the parameter that is being used by instance?
show parameter..?* At sql prompt enter
show parameter PARAMETER_NAME
or you can use the query
select name, value from v$parameter where name='PARAMETER_NAME';
>
2)How do you get the information of hidden parametersThe hidden parameters start with an "_".They can not be viewed from the output of 'show parameter'
or querying v$parameter unless and until they are set explicitly in init.ora.
Use the query (make sure you have connected as SYSDBA)
SELECT a.ksppinm "Parameter",
b.ksppstvl "Session Value",
c.ksppstvl "Instance Value"
FROM x$ksppi a,
x$ksppcv b,
x$ksppsv c
WHERE a.indx = b.indx
AND a.indx = c.indx
AND a.ksppinm LIKE '/_%' escape '/'
3)What is the database object that stores information related to various types of db connections over networkYou can query the view DBA_DB_LINKS
4)How do you verify since when the db session is runningselect (sysdate-logon_time)*24*60 "SESSION running since(in mins)" from v$session
5)How do you verify the Originating machine details of the database session
6)How do you verify the name of program that the db session is runningFor point 5 and 6 use the following query:
select program "PROGRAM" , machine "ORIGINATING MACHINE " from v$session
7)What is the naming convenion of Base tables. Where is the information of base tables stored?For naming conventions refer following links
http://www.oracle-base.com/articles/misc/naming-conventions.php
http://ss64.com/ora/syntax-naming.html
The information of Base tables is stored in the Data Dictionary
8)How are dynamic views created. Whre is the information of dynamic views stored?Refer the follwoing link
http://docs.oracle.com/cd/E11882_01/server.112/e10713/datadict.htm