Why "SQL> show parameter processes" command is not working? - sql

I am using oracle 10g express edition. I ran the command in sql command line and it says -- "ORA-00942: table or view does not exist"
PS: Trying to access and increase the number of processes. Cause I am facing this problem -- How to solve ORA-12516 error?

You're probably running this command as a non-privileged user. show parameter is just a fancy wrapper for select ... from v$parameter. You need SELECT privileges on this view:
grant select on v_$parameter to <username>;
(please note the _ in the view name - you cannot directly grant privileges on v$ views, you have to grant privileges on the underlying objects instead).
Of course, the simplest approach is to run show parameter as a DBA user.

Related

Request access to nearby Oracle database, need update statement (ora-01031)

I've got
url: jdbc:oracle:thin:#195.123.456.789:1521:someSID
User: artem
Password: unchangeableForAllUsers
I'm also got second DB, all the same, changing only the name
url: jdbc:oracle:thin:#195.123.456.789:1521:someSID
User: denis
Password: unchangeableForAllUsers
How can I make update query from one DB to other? Using pl/sql I've got next message from Web-browser, when I try to change artem.table to denis.table:
ORA-01031: insufficient privileges
SQL Statement ignored
When I try to save changes in artem pl/sql package(query to denis db, like that
update denis.table dt
set dt.someColumn=1
where dt.ID=3305;
), see next in my IDE:
PL/SQL ORA-00942: User table or view does not exist
While I'm in IDE, logged like artem, I can to change and commit other users db free, from IDE SQL console.. maybe couse they have the same url and password? How can I save my query
update denis.table dt
set dt.someColumn=1
where dt.ID=3305;
in artem package for get access(update cell) to nearby database from Web-site, when i logged there like artem.
Thanks
As described, this is not a jdbc or plsql issue but rather a permissions issue.
You are connecting to the same database, but as two different users. In Oracle, a user has their own schema (same name as the user). If you wish to access data in schema A from schema B, schema A must GRANT permissions to schema B.
For example, if you want the user "artem" to have permission to UPDATE table "mytable" in schema "denis", log into the account "denis" and GRANT UPDATE permission to "artem":
-- While logged in as "denis"
GRANT UPDATE ON mytable TO artem;
Now you can log in as "artem" and query "denis.mytable". Grants you may want to give: SELECT, INSERT, UPDATE, DELETE. This, of course, works both ways (if you want user "denis" to have access to "artem" objects, then "artem" must GRANT permission to "denis".

Insufficient privileges to access a table

There is a table which when I use to execute a query it gets normally executed but when I compile it in a package it is giving an error for that table saying
insufficient privileges
Any idea what I can do about it ?
The user you are using got the privilege to access the table through a role.
Privileges obtained through roles are not in effect inside a PL/SQL program. You need to grant the select (insert,update,delete) privilege directly to the user in question.

ORA-01031 Insufficient privileges while CREATING a VIEW?

When I try to create a view that including different tables I'm getting the following error:
Error at Line 1:
ORA-01031 Insufficient privileges.
Could anyone tell me what could be the problem. I tried following the another stackoverflow post mentioned here but it's pertaining to
different schemas.
ORA-01031: insufficient privileges when selecting view
Please let me know as I'm new here.
My Query is as follows:
ORiginal Question:Create a view to select employee ID, employee name, hire date, and department number.
MY SOLUTION:
CREATE VIEW SIMPVIEW AS
SELECT EMPNO, ENAME, HIREDATE,DEPTNO
FROM EMP;
Then probably you may not have the privileges to perform the CREATE VIEW command in your database schema... Log in into SYSDBA account and issue the command
GRANT CREATE VIEW TO <dbusername>;
Here <dbusername> should be replaced with the name of the user you want to give access to the CREATE VIEW command.
You can check if your user has VIEW creation privileges using select * from session_privs.
Note that to be able to create a view, the user that is creating it needs to have been granted SELECT privileges on all the objects being used, as well as the mentioned CREATE VIEW privilege. You can also check that by querying to USER_TAB_PRIVS with the user getting the error.
when I wanted to execute the above query in sql developer I faced issues as I did not have enough privileges to create a view or other oracle object schema such as trigger, packages, procedures etc. I found the error to i.e. “Error at Line 1: ORA-01031 Insufficient privileges”. so, I needed the all privileges to practice all these queries and programs. I took the following steps in order to solve my problem:
As I logged in as a user name ‘scott’, so my name is ‘scott’ not ‘Dhruv’. My ambition was to grant all the privileges to me i.e. to the user ‘scott’.
For that, I need to enter in the database as a DBA. Now, question is! How to log in as DBA. For this, I opened command prompt and I logged in the database as sysdba by following the below steps:
a) In window run, I typed cmd to open command prompt. I typed: sqlplus /nolog which means that I logged in without providing required credentials.
b) I authenticated myself for my underlying O/S and entered in database as DBA. For that, I typed in command prompt: connect / as sysdba;
c) I evaluated who is the DBA user in my database if exists. For that I typed: select name from V$database;
d) Here we go after this command. I finally granted myself (scott) to create view in sql developer by typing the command: grant create view to scott;
e) Finally, I granted myself all the privileges by typing: grant all privileges to scott;
Snapshot of command prompt: I have attached.
Finally, I executed and created my view: I have attached
I had this error, and the solution was to grant select WITH GRANT OPTION
to a table from another schema that was included in the view.
At first You need to give the user authentication so you need to know who dba in normal the system give this authentication so make conn system/ *password*
give grand or authentication by put grant create view to *DataBaseUsername*;
make the connection to your user and apply your command
You have to give select any table privilege to the user. Then the view will compile successfully. No need to explicitly grant select to the user to all the objects.

Cannot find table v$parameter in Oracle

I want to get the number of sessions in Oracle using the SQL query:
SELECT value FROM v$parameter WHERE name = 'sessions'
But I get this error:
Error starting at line 1 in command:
SELECT value FROM v$parameter WHERE name = 'sessions'
Error at Command Line:1 Column:18
Error report:
SQL Error: ORA-00942: table or view does not exist
00942. 00000 - "table or view does not exist"
*Cause:
*Action:
Maybe the Oracle user that I use is not privileged?
Generally the better approach is to use a procedure and grant the necessary privileges to this procedure. However if you want use SQL directly, you can grant SELECT_CATALOG_ROLE or SELECT ANY DICTIONARY to the user.
Probably. To grant the rights, you need to use the table name as V_$PARAMETER. It comes from some restriction when granting rights on dynamic views.
If you want to use SQL directly (referring to the second option in the accepted answer)
As of Feb 2023, using Oracle version 19, this works...
Connect as SYSTEM and run
grant SELECT ANY DICTIONARY to <user>;
But SELECT_CATALOG_ROLE didn't work for me...
grant SELECT_CATALOG_ROLE to ...;
There are documented differences between the two here:
http://www.petefinnigan.com/weblog/archives/00001461.htm
This is where the author gives the following info and warning:
Well, SELECT_CATALOG_ROLE allows access to some things Oracle deemed not allowed by SELECT ANY DICTIONARY so we need to be careful of granting this role on these grounds. BUT, the overwhelming issue for me is that SELECT_CATALOG_ROLE gives access to 4539 objects and SELECT ANY DICTIONARY gives access to 6228 objects (both numbers in 18c XE)
I am not sure why Oracle do not publish the full list of exclusions in SELECT ANY DICTIONARY but they do publish all of the main tables. We can easily find out anyway. For me, i want to know what does SELECT ANY DICTIONARY really mean. I want to know what i am actually granting if I give out that privilege; well it means access to 6228 tables and views in 18cXE
Both of these rights should not be used; they are a sledgehammer to crack a peanut. If someone needs access to V$SESSION or V$DATABASE and there is a legitimate reason to have that access then grant access on the individual views not SELECT ANY DICTIONARY or SELECT_CATALOG_ROLE.
using the privileges: - select any table, alter any table when running the grant as SYS with SYSDBA in Oracle 12c solved the issue for me.

Facing an error : table or view does not exist

I am using insert statement and trying to insert data into the database table. I am using stored procedures.
But I am getting this error while doing so.
Message: ORA-00942: table or view does
not exist ORA-06512
I checked if the tables/stored procedures are present or not and everything is in place. Also there is no typo in table names or in sp. If I run the part of SP from query editor it works fine but when I execute the entire SP it throws an error.
I tried the steps provided by Stephen but since I have logged in with the same user/owner when I run Grant command it gives me an error saying 'Cannot Grant/revoke on own'.
One more addition to this. I have a stored procedure SP1 in which I am using a select statement as
Select a from table_name where condition;
When I execute this seperately, it returns me some results. But when I execute sp it gives an error at the same line where it is written.
Can anyone help me out to resolve this issue. I am using SQL +.
Thanks in advance
Vijay
Justin's answer is correct but let me expand a bit.
Everyone who said that the table doesn't exist didn't read your whole post. Since you are able to:
If I run the part of SP from query editor it works fine
Obviously the table is there.
Obviously you have some access to it. Otherwise this wouldn't work when it clearly does.
but when I execute the entire SP it throws an error.
This is because Oracle distinguishes between permissions granted directly and those granted via a role.
Say I do this:
Create Table TABLE_A
Create Role READ_ONLY
Grant Select on TABLE_A to READ_ONLY
Grant READ_ONLY to VIJAY
In a SQL Window/prompt you could query that table without issue. So now you need to create a view
Create VIJAY.VIEW_A as SELECT * FROM TABLE_A
You'll get the error that TABLE_A does exist. Because a view is compiled, like a procedure it runs without any roles. Since it runs without the READ_ONLY role, it's blind to the fact that TABLE_A exists. Now what I need to do is
Grant Select on TABLE_A to VIJAY.
Now that you have a direct permission, you can compile a view or procedure/package that uses that table.
Does the table exist in the schema where the stored procedure exists? If not, the simplest explanation is that the owner of your procedure has been granted access to the table via a role not via a direct grant. A definer's rights stored procedure needs to have direct access to the objects it accesses. A quick way to test this is to disable roles for the session, i.e.
SQL> set role none;
SQL> <<execute your query>>
If that generates the error, the problem is the lack of a direct grant.
In Oracle you can choose if the stored procedure is executed with the rights of the invoker or the definer: http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17126/subprograms.htm#i18574
Check if the AUTHID property of the stored procedure is correct and if the resulting user has appropriate permissions.
Well, put very simply, the table that you are trying to insert data into does not exist in the database you are connected to. You need to check both those things (i.e. what are you connected to, and is the table there and accessible for the user context you are using).
As Joe Stefanelli said .. there are a lot of possibilities for the error being shown here.
Check whether:
You are connecting to the correct Oracle Instance.
You have permissions to query or perform processing on table that you are referencing in your query.
There is a difference between ordinary select statements and procedures. Procedures in oracle do not respect the roles assigned to a user; rather the permission needs to be explicitly granted to the user. For more information read the following linkORA-00942