I am new to Oracle databases. I have installed DBeaver (never used this before too) to connect to the database.
I have created a connection (which I believe is called database) and now I am able to see the database tables and everything. How do I take the backup of the Oracle Database in DBeaver so I can use it locally for test purposes before making any change on live database?
I can't find any option to take the backup of connection/database.
To do a proper backup of your Oracle Database, you should use the oracle provided utility, Recovery Manager. It's a command line interface that's called from your DB server shell prompt via 'RMAN'
You can also use Data Pump to export all or part of a database that can be used to import to another database...not really used for recovery of an existing database.
I'm not aware of your tool having interfaces for either of these Oracle features.
You might not need a backup at all for your needs, take a look at Oracle Flashback Technology.
DBeaver does not support oracle database export import. See details here:
https://dbeaver.com/docs/wiki/Backup-Restore/
You need to run the sqlplus tool to create a folder where oracle is going to import/export database dumps. Login should happen as sys as sysdba and enter the password you previously entered during database server installation. Example:
sqlplus sys/[your password] as sysdba
After you successfully logged into sqlplus run the following command (don't forget to set to a different folder that you prefer to use):
create or replace directory DATA_PUMP_DIR as 'D:\Database Backups';
Once this is done exit from sqlplus and enter the following command into the command line (again no sqlplus should be used here)
expdp sys/[your password]#localhost:1521/[listener name] file=your-database-dump-file.dmp owner=[your schema]
Once this is done and finished you can zip your database dump if you would like to upload it somewhere else. (I had 9 GB dump and the zipped size was 1.6 GB)
Related
My instructor gave me a username and password and .dbf file and tell me to open it and try to retrieve with sqlplus and oracle database
I tried to open the dbf file from excel mysql and ms server but it i gave me an error
Speaking as a DBA: As Littlefoot stated, you can't just read a data file from an Oracle DB. At best they are proprietary binary file formats, assuming it isn't encrypted on top of that. Nor can you take a data file from one database instance and just plug it in to another database instance. You also can't import it to mySQL or any other database engine: as a stand-alone data file it can only be properly read by its original database installation (i.e. the specific database instance that created it).
Oracle has specific tools available to copy data and/or files from one database to another, but those would generally use the RMAN backup manager (used to make physical backups) or (more likely in your case) the Datapump "Transportable Tablespace" feature.
To restore it from an RMAN backup you would need a complete full backup of the entire source database instance: RMAN backup sets including all data files, redo logs (and perhaps archived logs), control files, parameter files, encryption keys,, and possibly more.
To restore a transportable tablespace dump you would need your own running Oracle database instance, the correct parameters to run the impdp import utility, and the assistance/cooperation of the DBA.
You need to confirm if the file you were given is such an export dump (though the .dbf file extension would suggest not), and how you are expected to access the data. You won't be able to just "open the file".
.DBF extension probably represents datafile; I don't think you can read it with any tool (at least, I don't know of any).
You should find an Oracle DBA who might try to help; in order to restore a database (which is contained in that file), they might need control file(s), redo log files and ... can't name what other files (I'm not a DBA).
Then, if everything goes OK, database might be started up so that you'd be able to connect to it using credentials you were given.
I'm one of the junior DBA working in IT company.In my company there are so many schemas is there.Now my question is How to create a dump file(some times i'm working at home.That time how to use that dump file ).Please suggest me
NOTE:I am using Oracle SQL Developer.
Expdp helps in exporting the database and impdp helps in importing the database. you can directly export one schema to another (in different database also) by using network link concept.
If network link concept is used then the creation of separate expdp file is not required.
For example If you have to export a schema called schema1 with password pwd1 from source database to target database then
first you need admin privileges of your target and source schema.
You can create a network link between source and target schema
CREATE PUBLIC DATABASE LINK example_link
CONNECT TO schema1 IDENTIFIED BY pwd1
USING 'server_name:port/service_name';--(put source database server_name,port and service name)
then create a directory in your target server :-
CREATE OR REPLACE DIRECTORY exp_dir AS 'F:/location';
grant read,write on directory exp_dir to schema1;
After this login to your target server and from command line use the below command:
impdp dba_username/dba_pwd network_link=example_link directory=exp_dir remap_tablespace=source_tbs:target_tbs remap_schema=schema1:schema1 parallel=2
You should use the Oracle Data Pump tool. The tool allows you to export your data into a .dmp file and import it into any database. Here is a video showing how to use the data pump tool in SQLDeveloper. I think this is a relatively new feature in SQLDeveloper, so make sure you have the appropriate versions..
Video Tutorial HERE
From the command line, you can use data pump with the expdp and impdp commands like so..
Set your oracle environment by running the below command and providing your oracle SID
. oraenv
Then you can run your export command..
expdp directory=/bu1/dpdump/ dumpfile=myexport.dmp logfile=mylog.log schemas=users,products,sales
The parameters are as follows..
directory - the directory where to create the dumpfile and log
dumpfile - name of the dump file (should end in .dmp)
logfile - name of the log file (should end in .log)
schemas - comma seperated list of the schemas you want to export
NOTE: you need dba privileges to use datapump. It will prompt you for the credentials
Data Pump Documentation is here
Exporting of ORACLE database objects is controlled by parameters. To get familiar with EXPORT parameters type:
exp help=y
You will get a short description and the default settings will be shown.
The EXPORT utility may be used in three ways:
Interactive dialogue
Controlled through bypassed parameters
Parameterfile controlled
Example to the 2nd option:
exp scott/tiger file=empdept.expdat tables=(EMP,DEPT) log=empdept.log
Take a look at these links for further readings:
Original Export and Import
The ORACLE Import/Export Utilities
Up to this point, I've never done anything serious with an Oracle database. I know that they are different than what I've handled, like MS SQL.
So, coming from an MS SQL perspective, I can backup a database, copy over the .bak file to another server, restore it, creating a complete copy of the database.
I'm not sure how to do the same for Oracle, much less different versions. I've seen it done mostly with command lines, so I tried this:
$exp owner/owner schemas=tkcsdb directory=dumpdir dumpfile=dBaseName logfile=dBaseLog
And then the SQL Plus returns:
Unknown Parameter Name 'Schemas'.
Failed to process parameters.
Export terminated unsuccessfully.
I've since replaced the 'schemas' with 'schema' (same error), and I wanted to try using 'tables', though I'm not sure how that would turn out. I'm not even 100% if 'tkcsdb' is the name of the database I'm looking for - I've been unable to list all the databases I have.
What I want to do (which I've done with MS SQL, MySQL, and even IBM DB2 of all things) is looking to be quite difficult to replicate in Oracle.
As with the title, how do I export a 'database' from Oracle 11g XE and import it to Oracle 10.2?
I'm using Windows 7, the target machine is a Linux Fedora of some sort.
EXP and IMP are ancient - do not use them unless you absolutely have to. They cannot handle some of the features of newer Oracle versions.
The tools of choice are EXPDP and IMPDP (short for EXP datapump and IMP datapump).
Unfortunately, using them is a little more complicated, because you can run them only on the database server (contrary to old-style EXP/IMP, which you could run from any client computer).
So, to get your schema from the 11g source DB to the 10g target DB, you'll have to:
open a terminal session on the 11g DB server
run expdp with version set to 10 (so you can import it on the 10g server)
copy the dump file fom the 11g server to the datapump directory of the 10g server (look for a directory called "dpump")
open a terminal session on the 10g DB server
run impdp with your dump file
Example:
expdp scott/tiger#db11g version=10.2 schemas=SCOTT dumpfile=SCOTT.dmp logfile=expdpSCOTT.log
impdp scott/tiger#db10g schemas=SCOTT dumpfile=SCOTT.dmp logfile=impdpSCOTT.log
I have a machine running Oracle 10g server in windows server 2008. I want to take backup of the database. I also want to take backup of some files saved on hard disk by oracle server that users have uploaded using my website.
I can connect to the Oracle server using sql developer and sqlplus. I can run sql queries on the server.
In order to take backup of database I have to run the command "exp" (this is the only way of taking backup of databases that I know). There might be some other way but there is another problem because of which I must run dos command. That problem is to take backup of files. These files are stored in c:\mydir. The folder mydir is not accessible anyway through web and is not a shared folder.
I have tried running "host " in sqlplus after connecting to oracle server, that is at "sql>" prompt. The command ran successfuly but at local machine, not at oracle server.
Edit: The "host" command is provided by sqlplus and is not an oracle command, means cannot be used in a query. Sqlplus even when connected to remote machine run the "host" command at local machine.
The target is to either make sqlplus run the "host" command at remote machine, Or run the dos command from inside a pl/sql query (independent of sqlplus).
In addition to what Justin has written:
If you want to take a logical snapshot of the database the new DataPump tool is preferred over the old (and deprecated) exp tool.
DataPump is a commandline tool (expdp) but also has a SQL API through Oracle packages and procedures.
The Data Pump API (including examples)
DBMS_DATAPUMP (reference)
But if you want a "real" backup you should look into RMAN
It is possible to create a Java stored procedure on the database server that executes an operating system command on the Oracle server. But it would be extremely unusual to use the export utility to backup a database-- that only creates a logical backup not a more appropriate physical backup. And it would be extremely unusual to run a backup by connecting to the database via SQL*Plus and spawning a job on the server operating system. It would make much more sense to create a job using the Windows scheduler on the database server that ran whatever export commands you want to run.
I'm really newbie about Oracle backup operations. I'm really new in this world and I need to know how to backup a DB schema and restore it in another machine under another schema name.
I cannot afford any mistake since I'll be doing this in our customer site, an making a small mistake could be the last one
I don't want to sound offensive, but doing this in MySQL is really easy, like this:
in server one:
$mysqldump --user=user --password=password db_to_backup > bc_name.sql
-after transfering the sql script to another server
in server two:
mysql>create database db_to_restore;
$mysql --user=user --password=password db_to_restore < bc_name.sql
I need to do the same using Oracle, I read some documentation but I'm still unsure how to do it:
First: What's the equivalent of MySQL database in Oracle? tablespace?
Second: I think these are the steps to get a backup
mkdir /opt/oracle/dumptmp/
CREATE OR REPLACE DIRECTORY dumptmp AS '/opt/oracle/dumptmp/';
expdp user/pass#tablespace directory=dumptmp dumpfile=dumptmp:full.dmp logfile=dumptmp:full.log full=y
Third: Then I move the file "full.dmp" to the other server, but I'm not sure how to restore my backup file full.dmp into a new tablespace with a different name to the one it the backup was gotten from:
SQLPLUS>create tablespace ts_something;
then I'm not sure how to proceed from here. Please advice me how to do it using command line commands since my customer does not have GUI tools intalled.
Thanks a lot!
First of all, make sure you test this procedure in test or development environments before proceeding to perform it on production. Disclaimer: I'm not responsible if you bust any of your databases by misusing the following advice. Note that I'm also ignoring how tablespace storage is set up for your schemas, which you should definitely hold in consideration when creating new schemas.
Here is the simplest possible method using command line. You will need to use exp and imp utilities which come with complete Oracle database distributions. Assuming that you have the path to Oracle executables set correctly in your environment path, you will need to do:
Export your source schema on the source database server:
[oracle#src_server ~]$ exp source_schema_username#SRC_SID owner=source_schema_username file=source_schema.dmp
Import your source schema into destination schema on the destination database server (assuming you have already created the destination schema, if not, see CREATE USER, also make sure that destination schema user has RESOURCE role):
[oracle#dst_server ~]$ imp system#DST_SID fromuser=source_schema_username touser=destination_schema_username file=source_schema.dmp
Note that you must run imp as a user that has DBA role. I'm using system here because this user typically exists on all Oracle databases and has DBA role. You will of course need to know the password for system user. You may not need to specify SIDs if ORACLE_SID is already set in your environment on both servers (echo $ORACLE_SID), however I wanted to be explicit here to make sure that you do not import into the wrong database.
For more information on usage of export and import utilities run exp help=y and imp help=y.
To answer your questions about Oracle:
First: What's the equivalent of MySQL database in Oracle? tablespace?
Oracle equivalent is database name (db_name parameter). It identifies a database on Oracle database server(s). On a single instance database, this is also typically Oracle SID. On Oracle RAC, a single database will have many SIDs.
Third: Then I move the file "full.dmp" to the other server, but I'm not sure how to restore my backup file full.dmp into a new tablespace with a different name to the one it the backup was gotten from:
You want to create a new user, which is identical to a schema in Oracle. Tablespaces are abstracted collections of disk locations where Oracle stores tables and indicies. For example, when you create a table, it has to be assigned to some tablespace.
What you're explaining is not really a backup, more like schema export & import.
but doing this in MySQL is really easy.
So is doing the same in Oracle.
exp user/password#hoststring file=bc_name.dmp log=bc_name.log full=y statistics=none
& to import it,
imp new_user/new_password#hoststring file=bc_name.dmp log=bc_name.log full=y
If new_user doesn't exist then create the users
create user new_user identified by new_password
and grant the rights
grant create session,connect,imp_full_database to new_user