i am facing problem, while importing data from one DB to another. The problem is with when i want to import a table which contains BLOB type data. Can any one please help me, how to import BLOB type data or how to move BLOB type data from one DB to another.
Please help me.
Do you want to simply move a table from one Oracle DB to another? Use Oracle Data Pump.
Copy data from one Oracle DB into another Oracle DB, perhaps into a different table structure? Use PL/SQL with DBMS_LOB package.
Also, have a look at the Large Objects Applilcation Developer's Guide.
Related
I need to export data from one schema and import it to another. But in the second schema there are tables with different names, different attribute names, etc, but these tables are suitable for data in first schema. So I export data as SQL inserts and manually rewrite names etc. in this inserts.
My problem is with tables which have columns with type BLOB. PL/SQL Developer throws error:
Table MySchema.ENT_NOTIFICATIONS contains one or more BLOB columns.
Cannot export in SQL format, use PL/SQL Developer format instead.
But, when I use PL/SQL Developer format (.pde) it is some kind of raw byte data and I can't change what I need.
Is there any solution to manage this?
Note: I use PL/SQL Developer 10.0.5.1710 and Oracle database 12c
i am working on a large database ,how do i Export some database tables without having dba privileges .do i have to copy the structures of the tables and using spool command to get the data in a text file then create the tables and inserting data from the text file?
One of the methods would be to install Oracle SQL Developer and export the required table structures and data using the wizard.
Here is the link to a tutorial which can guide you if you go with this option.
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/sqldev/r30/SQLdev3.0_Import_Export/sqldev3.0_import_export.htm
A second option would be to use SQL Loader to load data in your target tables. But for that you will have to first create the data structures on your target schema and spool the data from your source tables in CSV (comma separated values) or any other eligible format.
Here is a link for SQL Loader.
http://docs.oracle.com/cd/B28359_01/server.111/b28319/ldr_concepts.htm
A third option would be that you create the table structures on the target schema and generate the insert statements from the source schema using a script. Here is a link to such an example.
https://pandazen.wordpress.com/2008/08/18/generate-insert-statement-script-to-extract-data-from-oracle-table/
I would recommend going with the SQL Developer option since it is relatively simple.
in plsql when I create and compile a procedure, whether inside a package or standalone, how specification and body of procedure is saved in database?
Like all the other data about objects etc, the text of the code is stored in the dictionary tables. You can see the package contents by querying user_source, all_source or dba_source, depending on which level you're viewing the data at.
The actual compiled version of the code that Oracle keeps is, as far as I know, an internal thing that isn't available to be queried in the dictionary tables.
I want to load data from one table from one schema to another schema on daily basis.
Tables are in different database so to create database link will not be an option due to some security purpose....
About million records will get process....
Databases are on different server , from database "A" I am fetching Employee presence details by combining emp details and emp presence table for period of a month , and loading this data in other table on database "B". Need to run this activity on daily basis.
I need to run a job daily at low peak hours to get complete copy of table into other db ...
will Import/Export or loading data with help of sqlldr?
please let me know the correct way..
Thanks in Advance..
What are my best options?
Well, it seems that using database link would best fit for your situation. If you want to read a table from a database, you should have read privilege. Perhaps you can ask the DBA creating an account(user) which only has read privilege for specific table. Then you can use database link connecting with the new user.
You can't update or delete data from the table because the user you connecting doesn't have the write privilege. This can solve the security problem.
exp/imp and sqlldr are different tools. They don't work together. You can only import data from an export file. You can't load export file with sqlldr.
If you want to run this periodically, it sounds like you might want to take a look at the Oracle Scheduler
Overview: http://docs.oracle.com/cd/B28359_01/server.111/b28310/schedover001.htm
To export the data and add it into the new database, you might want to use Oracle DataPump, which can do both the export and import for you, securely.
Data Pump Export: http://docs.oracle.com/cd/B28359_01/server.111/b28319/dp_export.htm
So your bet might be creating a shell script that uses data pump to create an export file from database number 2, and then uses data pump again to import said file into database number 1.
Once you have that script, you can schedule it to run during nights or at any time you have low traffic.
Regards
I need to create a flat file and push information into it from oracle database using JSP.
I require a sample code. Help will be appreciated.
If you're looking for an easy way to write different SQL statements to a file, use this procedure: http://www.oracle-developer.net/content/utilities/data_dump.sql
Also you might want to look into DBMS_XSLPROCESSOR.CLOB2FILE.
I think you need to look into Oracle external tables. These are flat files that appear as tables in the Oracle database. You would simply insert data into it using SQL (as per any other database table). Google "Oracle External Tables" for more information.