We are using Oracle docker image for Oracle database 12.2.
By default it seems the Multitenant feature is enabled.
Is there any way it can be disabled?
We have only one application to support and do not want to create pluggable database for that.
Any help greatly appreciated!
Thanks
Fair warning:
The non-CDB architecture is desupported starting in Oracle Database 20c.
You can use the CDB architecture with one user-created PDB without a Multitenant license. From Oracle Database 19c, this extended to three user-created PDBs in a CDB.
The short answer is there's no way to disable the CDB architecture.
To switch to it, you'll need to install a new non-CDB database. Then migrate the data from your existing database to it. For example with Data Pump export/import or some other data replication/migration tool.
Related
I've got to update the data of an Oracle DB but I'm not the owner and ain't got any Oracle License.
The goal is to explain to my interlocutor how to create a dump from his Oracle DB, to find out how to restore this dump in a DB (a free version of Oracle or something else), update some data in some tables, and then make another dump to send it back to my interlocutor.
So the differents questions I have are:
1- Is it possible to create a dump (maybe in SQL format) without any specifics dependencies to Oracle ?
2- Is there a way to restore this dump in a free lightweight Oracle, or another kind of DB like Postgresql ?
3- Does Oracle, is able to handle any kind of dump et restore it in an Oracle DB or is there any constraints to respect ?
I am very new to Oracle and ain't got, on my personal computer, any possibility to try out the dump/restore by myself; that's why, any help will be appreciated !
1- Is it possible to create a dump (maybe in SQL format) without any specifics dependencies to Oracle ?
Oracle offers Data Pump utilities (export and import) for such purposes. You'd export table (or schema) - result is a ".dmp" file, readable by import utility. You'd then move that file to your own server (see #2 for the rest)
2- Is there a way to restore this dump in a free lightweight Oracle, or another kind of DB like Postgresql ?
On your own server (which could be a laptop; no problem), you'd install a free Oracle Express Edition (XE) database. Currently, the last version is 21c, but some others should still be available in Oracle Technology Network's Download section.
3- Does Oracle, is able to handle any kind of dump et restore it in an Oracle DB or is there any constraints to respect ?
XE database has its limits - from your point of view, the most important is that it can handle up to 12GB of user data. Therefore, if the .dmp file doesn't contain more data than that, you should be able to import it.
Another constraint is the compatibility. Not all exports can be imported into all databases. There's a matrix which shows which versions match; it is available on My Oracle Support site (but you have to have access to it, which you - as you said - don't. Though, generally speaking, "close" Oracle database versions can interchange .dmp files. It would be best if these two database versions match, of course.
We have a custom inventory system, for tracking all of our database, including Oracle v12 and v19 based databases. But as our DBA team has work with Container Databases (CDB), we need to identify, which one is a standalone or container, but we don't have any option to connection to the, due to our security policy.
Is there any way to Identify oracle Container Databases (CDB), without connecting to them?
As after reviewing Oracle official documentation: https://docs.oracle.com/database/121/ADMIN/cdb_mon.htm#ADMIN14174.
It seems that it's not possible, as the documented clearly mentioning, that first, it's necessary to connect to the database, and only then to run the following command: SELECT CDB FROM V$DATABASE;
And if the CDB column returns YES, the current database is a CDB. and NO, if the current database is a non-CDB.
My work uses Oracle 10G and is planning on installing Apex. In the meantime, I have downloaded Oracle XE and have taught myself APEX on it; however, I can only access users/tablespaces that I have made in the XE database. What I would like to do is use the XE's Apex to access the users/tablespaces in the production databases of my work.
My colleague says that this should be possible because my workstation is connected to the server, and that there should be a way to configure access from my XE's Apex to the 10g's databases, such as by setting up an appropriate DAD.
I see nothing in the Apex user interface to allow this. I've read every word of the Apex documentation but nothing registered.
XE uses the embedded PL/SQL gateway, as opposed to 10/11G which uses either an Apex Listener or an HTTP Server with the mod_plsql plugin.
Thank you,
Matthew Moisen
I have done this before where we didn't have access to the actual database hosting the data to be worked with save for the standard port 1521 listener access. Apex at the time was new enough to the organization that the DBA's also had a voodoo taboo on using their database server as a webserver gateway as well. You can use your database instance with APEX installed as a "middle tier" or app server with the following steps:
Set up an account on your 10g database that is accessible remotely via dblink.
Set up dblinks to your 10g database table on your workstation with XE installed, use the account and connection information for the 10g database as set up in (1). Note, you may have to update a TNS names file or explicitly indicate your host/networking settings within the dblink itself.
For simple sanity and simplicity in coding your apex projects, set up synonyms for all your dblinked objects (i.e., table1 for table1#dblink) so you're not referencing the dblinks directly in your apex code. Making changes later will be easier if you adhere to this.
That's it. One proviso is that you need to know that LOBs will not work with the out-of-the-box functionality of APEX driven DML operations while using dblinks. This may have changed with the newest version. One workaround you may consider is trying to use a stored procedure which passes your LOB data as a input parameter which will do your DML operation for you.
Otherwise, this approach works nicely. The place where I implemented this model has several production level apps, a test and a development tier all using servers hosting APEX separately from the actual data sources. We used Oracle Standard Edition One (for the support), but Oracle XE should work as well since APEX is the platform in common between either Oracle version.
I want to migrate database server from Oracle 9i to Oracle 11g (WebLogic version is 8.1 SP5).
After migration, WebLogic version will remain the same. Only database gets changed.
How can I achieve this?
Is taking DB dump before migration and importing dump after migration enough for this task?
Or do I need to do other things as well?
Thanks.
Yes, most likely a DB dump will do the trick. Oracle data types are backward compatible, so, you are covered.
I have 2 databases, Oracle and SQlite. And I want to create exact copies of some of the Oracle tables in SQLite in one of my applications. Most of these tables contains more than 10,000 rows so copying each table by going through each row programmatically is not efficient. Also the table structure may change in the future so I want to achieve this using a generic way without hard-coding the SQL statements. Is there a any way to do this?
p.s. - This application is being developed using Qt framework. All the queries and databases are represented by QtSql module objects.
Can't help with Qt framework, but for large amounts of data is is usually better to use bulk-copy operations.
Export data from Oracle
http://download.oracle.com/docs/cd/B25329_01/doc/admin.102/b25107/impexp.htm#BCEGAFAB
Import data into SQLite
http://www.sqlite.org/cvstrac/wiki?p=ImportingFiles
IHTH
What you probably really want to use is the Oracle Database Mobile Server, which can automatically synchronize a SQLite and an Oracle Database.
The recent release of the Oracle Database Mobile Server (formally called Oracle Database Lite Mobile Server) supports synchronization between an Oracle Database and a SQLite or a Berkeley DB database running on the client. It supports both synchronous and asynchronous data exchange, as well as secure communications between client and server. You can configure the Mobile Server to synchronize based on several options without the need to modify the application that is accessing the database.
You can also find an excellent discussion forum for questions from developers and implementers using the Mobile Server.