I have downloaded the SQL Developer. Currently, I am using my school database but it is for temporary use. I want to use it after finishing my college. I do not know how can I make local connection in SQL Developer. Can you please help me in this.
Oracle SQL Developer is a tool you use to access an Oracle database.
So, if you want to use Oracle on your own computer, regardless there is (or is not) a connection to your school network, you'll have to install the database as well. I'd suggest Oracle 11g Express Edition. The installation process is simple; more or less, clicking NEXT a few times does the job. I'd, though, recommend you to follow the Installation Guide and pay attention to what the Installer asks (for example, write down passwords you choose).
Furthermore, in order to "copy" the database (actually, I believe you mean "schema" in this case) to your database, the right way to do that is to use Data Pump. You'd use Export in school to export the database, and Import on your computer to import it.
However, as Data Pump requires access to a directory (it is an Oracle object which points to a file system directory, usually on the database server; it is created by SYS and other users are granted read and/or write privileges on it). If you can't get access to it, you can use the original EXP and IMP utilities. EXP creates the DMP file locally; you'd put it onto a memory stick (or, if you're on the network, copy it directly to your PC) and import it.
If you're unsure of whether you can (or can not) do that, ask your teacher.
Once the schema is imported into your database, use SQL Developer to access it. Should be no problem to do that.
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.
I would like to use Oracle database instead of MySQL in Joomla. Is this possible with Joomla, is there a workaround or a solution on how to implement Oracle database with Joomla? Any information will be greatly appreciated.
It is said that it can be done, but it is not a job for beginners and took those guys 3 working days to do it.
Here's why that combination doesn't work by default:
The database and table creation script does not work without modification.
The connection and the database class are written to connect to MySQL and not to Oracle (so they all use MySQL functions).
Some of the extensions use native MySQL functions directly, instead of connecting using the Joomla Database interface (class).
This is what they did to make it work:
We fix the SQL installation script to accommodate the Oracle database in case of a new installation. In case of an existing installation, we export all the database, as well as its data to a SQL file, and then we modify the SQL file (using find and replace) to make it work with an Oracle database.
We load the modified installation file or the modified exported SQL file into the Oracle database.
We then create a copy of the Joomla database class, and then we modify all the functions to work with Oracle instead of MySQL.
We ensure that the Oracle drivers are properly installed and loaded by the php.ini file.
We rename the original MySQL database (you will know in the next step why) to something like database_name_old.
We switch to the new database class and fully test the website to see if some extensions are not working. If an extension ceases to work then it is a sign that this extensions is calling the original MySQL database (which no longer exists because it was renamed) directly.
Hopefully, you aren't a beginner and those guidelines will help you do it. Otherwise, check how much it might cost by visiting the page.
The company's server encountered a virus, and the server administrator reset the server. Luckily, they kept the oracle instance folder, but I didn't know how to extract the data from it.
This is the legacy oracle instance folder
I tried to move system01.dbf directly to my oracle, but failed
My English is not very good, this writing is written in Google translation, I hope I can express accurately,thanks.
Good Day. I have a situation which I am unsure of how to solve. I have searched numerous places and found nothing concrete.
The scenario:
I have 3 Oracle Apex 5 applications running on a single server using Oracle Express locally in order to run the app. I however had to go to Oracle 12c which is installed as a separate instance on the same server and it's listener is now listening on 1522 where XE is still listening on 1521.
I am needing to find a way to export the schema, tables, apps etc. into 12C from XE, then simply configure the apps to connect to the 12C instance and no longer on XE. I can then remove XE completely.
I know I am supposed to post what I have tried, but simply have no code, I have tried to do a export DDL but the script does not seem to carry the Schema data at all.
Question: How can I migrate everything on the XE instance to the 12C instance without breaking either instances.
Any direction would be appreciated.
Two steps: data(base) migration & (Apex) application migration.
The simplest way to move data is to perform export and import. Although you can use the original EXP and IMP utilities, consider using modern Data Pump Export and Import.
EXP and IMP are somewhat simpler; export (DMP) file is created on your disk
Data Pump requires you to create an Oracle directory (object) which points to a directory on the disk. As it is XE installed on your computer, no problem if it is, for example, C:\Temp
syntax is very similar in both cases, especially if there's nothing fancy in your data
The second step is application migration; you should first install Apex in the new Oracle 12c. Make sure it is up and running (create a workspace, assign a schema (you've just imported) to it, create a developer).
Then export the Apex application(s) - if there are only a few of them, a simple way is to do export from the application itself (you'll see the "Export/Import" button in the "main" application page within the App. Builder). Follow the wizard. The result will be a plain textual (.SQL) file.
In Apex on 12c, revert the process - do the Import by navigating to previously exported .SQL file, follow the wizard once again. Once the import is finished, you should be able to run the application.
Good luck!
I need to automate a selective table / user object backup I currently am doing via PL / SQL Developer.
The way I currently do it is via Tools/Export Tables and Tools/Export User Objects, manually select tables / objects, then set the options, choose destination and export. I do this from a windows laptop and the database is located in a suse linux server, both are in the same LAN. DB is running 24/7 and can not be shutdown. Also currently my oracle programming skills are very basic as I only do maintenance to this solution. I would like to keep doing the backup process in the windows laptop, but I would consider a server side script solution also and then retrieving the .sql files from server.
Thanks in advance
I wouldn't really call it a backup, but look at exp/imp and expdp/impdp (data pump) in the Utilities manual
As Gary implies exp/imp really isn't a backup solution. If this database is important to you or others, figure out how to use RMAN , which is usually configured to run in a mode that doesn't require the database to be shut down. Although it executes on the database host and for non-tape destinations must write its files to a filesystem attached to the host, it can be launched remotely.
RMAN is aimed at restoring/recovering the entire database, so if what you're looking for is only the ability to recover isolated objects it may not be for you.