I'd like to perform an oracle dump of my data and then load it back in after re-installing the software.
The problem is however that as I re-install the software, the schema of the data which I just exported may have changed slightly.
In mysql, I would hand-edit the SQL formatted dump file before importing it to match any schema changes.
But Oracle uses a proprietary dump/load format :(
Any tricks to preserving my data? Thanks!
BH
You can export the data and import the data into another schema (created by you) and copy the data from your schema to newly created application schema with some sql statements.
Related
I am working on a project to import data from a Sybase database backup. From my review of Snowflake documentation I see no mention of how one might do this other than writing custom ETL to export data for each table into a supported structured data format (e.g. csv or xml) and then load that file into snowflake.
Is there a way to have Snowflake load schema and data directly from a database backup file? Even if there is a way to do this for some other database vendor (other than Sybase) that might be helpful.
I would like to know the steps on how to restore data dumped from an Oracle database to a SQL Server database?
Our purpose is to get data from an external Oracle database out of our organization. Due to security concern, the team that manages data source refused us to transfer data through ODBC server link. They dumped the selected tables that we need so we can restore the data in our organization. Each table's data files include .sql file to create table and constraints, a ".ctl" file, one or multiple ".ldr" files.
An extra trouble is: one of the tables contains a blob column, which stores a lot of binary data files, such as PDF etc.. This column takes most of the size of our dumped files. Otherwise I could ask them to send us data in excel directly.
Can someone give me a suggestion about what route we should take?
Either get them to export the data in an open format, or load it into an Oracle instance you have full control over. .ctl and .ldr files looks like they used the old SQL*Loader.
I have to move data from existing database oracle to which I don't have direct access. The data is about 11 tables, 5GB each. The database admin can export the tables to some .csv or xml. The problem with csv is that some data is textual with lots of special characters. The problem with xml is that the markup is an overhead which will increase significantly the size of the files. The DBA admin is not competent enough to provide a working and neat solution. He uses toad as the database tool. Can you provide some ideas how to perform such a migration in the best possible way?
Please refer the below steps to migrate the data from Oracle to SQL server.
Recommended Migration Process
To successfully migrate objects and data from Oracle databases to SQL Server, Azure SQL DB, or Azure SQL Data Warehouse, use the following process:
1.Create a new SSMA project.
2.After you create the project, you can set project conversion, migration, and type mapping options. For information about project settings, see Setting Project Options (OracleToSQL). For information about how to customize data type mappings, see Mapping Oracle and SQL Server Data Types (OracleToSQL).
3.Connect to the Oracle database server.
4.Connect to an instance of SQL Server.
5.Map Oracle database schemas to SQL Server database schemas.
6.Optionally, Create assessment reports to assess database objects for conversion and estimate the conversion time.
7.Convert Oracle database schemas into SQL Server schemas.
8.Load the converted database objects into SQL Server.
You can do this in one of the following ways:
* Save a script and run it in SQL Server.
* Synchronize the database objects.
9. Migrate data to SQL Server.
10.If necessary, update database applications.
For more details :
[https://learn.microsoft.com/en-us/sql/ssma/oracle/migrating-oracle-databases-to-sql-server-oracletosql?view=sql-server-2017]
After the admin export data into CSV, try to convert it into a character set which will recognize all special characters.
Then, try to follow the steps from this link: link, it might work.
If after the import, there are still special characters, thy to manually convert them.
Get the DBA to export the tables using the ASCII delimiters which were designed for this purpose:
Row delimiter: Decimal 30 / 0x1E
Column delimiter: Decimal 31 / 0x1F
Then you can use BCP (or any other similar product) to upload the data to SQL Server.
Can SQL Server or db2 do entire database exports like oracle (using exp command)?
I've searched the internets and found bcp for SQL Server. But it seems I would have to iterate over all the tables to get what I want.
For db2 it looks to be roughly the same. Is there something I'm missing? Anyone have any suggestions and/or any opinions? Thanks ahead of time.
This is for SQL SERVER
Backup & Restore
To take an entire database with SQL Server, you can do a BACKUP and RESTORE
BACKUP: http://msdn.microsoft.com/en-us/library/ms186865.aspx
RESTORE: http://msdn.microsoft.com/en-us/library/ms186858.aspx
Export and Import
You can right click a database in SQL Server Management Studio, and under TASKS, click on EXPORT DATA. Follow the Wizard to choose the objects you want to export and put them into the appropriate location.
Custom SSIS for Raw format
Build a SSIS package that will read data from source table and put it into a RAW file on disk for later use. Raw files holds the structure of the table and the data.
DB2 for Linux, UNIX, and Windows has a utility called db2move, which generates the DDL to rebuild the database from scratch, and iterates through all the tables to dump their contents to flatfiles via the EXPORT command.
I'm not sure if this is the site for this question or not [if so put in the comment or vote to move it]
How can I copy only the data from one database to another within the same server on SQL Server 2005?
The two databases have the same schema but not the same data.
I'm trying to get the data from one database to another.
I am not able to restore from a snapshot [that screws over the security settings on the database]. I'm not able to use the import data wizard, because that is trying to copy over schema data as well.
redgate SQL Data Compare is one option.