Migrating Data from Informix to oracle

Is it advisable to migrate the whole schema from Informix database to Oracle 10g or migrate each table using sqlldr. If the data model is not exactly same then can we export data from informix and import the dump file in Oracle 10g.

You can use Generic Connectivity. It is a free feature of the database available on Windows, HP, AIX and Solaris and Linux (v10g).
There is also the transparent gateway for Informix however it is not certified with Informix 7.2. It is certified with 7.3 and higher.

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Migration Issues from Informix to Oracle (datetime format)

Hello, i am performing a Migration from Informix to Oracle, drive by Migration Workbench, i have an error migrating data from datetime and date fields. I suppose its related by datetime and date format, cause the error tells "Incorrect day or month" when i am migrating data from informix. Targets Oracle database date format is DD/MM/YYYY and source`s Informix database date format like MM/DD/YYYY. Is there any way, in OMW, to specify the mask of datetime or date format to convert date strings from informix to oracle format? Or have i got migrate offline and modify control file to do that with sql*loader?
How can i do that?
Example, especify to_date('....', 'MM/DD/YYYY H24:MI:SS') format for migrating informix datetime fields to Oracle.

The problem i have is, several tables witch contains date and datetime fields, at the same table in informix, by migrating drive by omwb to oracle, the date format i receive from informix at reading is DD/MM/YYYY and datetime format receiving is HH24:MI:SS. Migrating date and datetime types from informix to date, both types to date in oracle, i get an error while matching DD = HH24, MM = MI and YYYY = SS where nls_date_format is DD/MM/YYYY and, the same error matching HH24 = DD, MI = MM and SS = YYYY when nls_date_format is HH24:MI:SS.
If i set nls_date_format as "DD/MM/YYYY HH24:MI:SS" i get the same error, cause reading data from informix results in data format "DD/MM/YYYY" for date fields and "HH24:MI:SS" for datetime fields.
I have more than 200 tables in informix with this problem to migrate to oracle, i can solve by migrating offline, modifying datacontrol file to casting to_date format, but over 200 tables, 200 datacontrol files... is there any way for solving that by online migration in omwb?

Migrate data from orcle to oracle

Hi ,
A) Using oracle workbench tool can we migrate data from oracle 9i to oracle 10g ?
B) Is this tool used only for migrating data from non-oracle source to Oracle db ?
regards
thiru

Dear Barry
Thanks for the valuable information provided, it had answered few of my doubts.
i am much thankful to you if you can help me in this regards.
Does Oracle own any GUI based tool similar to Microsoft-DTS to Extract & transform data from one Oracle DB to other Oracle DB ?
The source DB (oracle 9i) is not properly normalized , the data from source is moved to a Normalized 10g DB with new attributes(based on new requirements) added to these tables . Some tables from source are splitted into 2 or more in target (oracle 10g) database. I have scenarios like
My text below quotes "SOURCE" AS UNNORMALIZED DB & "TARGET" as new DB which is NORMALIZED.I need to migrate data from SOURCE to TARGET
1) A single row in SOURCE be migrated to multiple rows across one or more
tables in TARGET.
2) A multiple rows in single column in SOURCE be migrated to single row and
multiple columns in TARGET.
For the above mentioned scenario sql*loader /external table/export & import or transportable tablespaces can be used as mentioned by you. but considering the ease of use and the complexity is there any GUI tool which oracle has for data migration from oracle db to oracle db.
your advice will be much help to me.
Thanks
Thirumaran

Migrating data from Informix 7.2 to Oracle RDBMS

I've got several applications running on an Informix 7.2 database and I need to migrate this data to an Oracle 8.1.7.4 database. Is there a gateway product available to aid with getting this data migrated. We tried Oracle Migration Workbench but Informix 7.2 is not supported. Any help with getting this done is appreciated. I don't want to keep these apps on Informix!!!

You can use Generic Connectivity. It is a free feature of the database available on Windows, HP, AIX and Solaris and Linux (v10g).
There is also the transparent gateway for Informix however it is not certified with Informix 7.2. It is certified with 7.3 and higher.

Migrate datas from RDB to Oracle 10g

The applications that use the RDB database are being re-write with Forms based on an Oracle database.
Of course, before we use the new application, we will have a step for moving datas from old tables in Rdb to the new tables (new design) in Oracle (developpers are working on sql scripts for that). But when the new applications with Oracle db will be in production, I would like to save datas (datas as datas) from Rdb in an Oracle database with the same struture as the rdb structure (same tabels, with same columns and same datas in). The idea is we will be able to verify datas through SQL.
Do you have any idea ?
Thank you
AnneMar

Hi AnneMar,
there exists a Metalink note that serves as a starter for such a migration:
Note 135929.1: RDBPROD: Advice on Converting from Oracle Rdb to Oracle RDBMS
For your convenience I am pasting that note here.
Regards
Wolfgang
PURPOSE
To provide general advice on migrating from Oracle Rdb to Oracle RDBMS
SCOPE & APPLICATION
This advice is intended for people who have already decided to convert, and are starting to plan how to do it. It provides a broad outline of how it can be done and some of the things to consider.
Advice on Converting from Oracle Rdb to Oracle RDBMS
General notes
* The longer you leave it the easier it is likely to be. The SQL interfaces to Rdb are growing closer to those for RDBMS, particularly OCI Services for Rdb.
* Converting the database will probably be the easy part. The applications are likely to require more work.
* A staged approach is more likely to be successful than trying to do everything in one go.
A possible strategy for converting
1. Install OCI Services for Rdb. Pick a small application, or one that needs rewriting anyway. Convert the application using the method and tools of your choice to access the Rdb database via SQL*Net for Rdb. If unsatisfied with the results, you can repeat this with alternative methods or tools, until you find one that works for you.
2. Install RDBMS. For those tables used by applications converted to use OCI Services, create database links. Point the converted application to the RDBMS database instead of the Rdb one. This step can be done whilst other applications are being converted. No data is yet stored in the RDBMS database, so any problems that arise with it, possibly due to lack of appropriate DBA experience, can be worked around by just pointing the programs back at the Rdb database.
3. Now you have a choice.
1. Gradually move the data into the RDBMS database. First new tables, then tables only accessed by applications that have already been converted. This has the advantage of taking one step at a time, so it would be easy to back up temporarily if a problem is found. The main disadvantage is that now that the data is spread over two databases your backup and recovery strategy will be more complicated.
2. Finish converting the applications. Then transfer all the data over in one go. If there is a lot of data, then going back would be a big job, so there is more risk.
Alternative common interfaces
Besides OCI Services there are several other APIs that applications could use to access Rdb or RDBMS transparently.
* JDBC - If your applications are written in JAVA or you want to rewrite them in JAVA
* ODBC - If your applications run on Windows
* .NET - If your applications run on Windows
Techniques for converting a database
* Transferring Metadata Extract the metadata using RMU/EXTRACT. Cut down and edit the output to produce a script to use to create the corresponding RDBMS objects.
* Transferring data
For small tables,
INSERT INTO rdbms_table SELECT columns FROM rdb_table;
(using dblinks to the rdb database and SQL*Net for Rdb)
For large tables, use RMU/UNLOAD to create a delimited file and then load that into RDBMS using SQL$Loader.
* Keeping data current in RDBMS while testing the transfer can be done using the Logminer Option in Rdb.
Notes
1. OCI Services for Rdb was formerly known as SQL*Net for Rdb and is part of Oracle SQL/Services. Though this is structured as a separate product from Oracle Rdb no additional license is needed.
2. Some limits are different between Rdb and RDBMS.
For example: in Rdb table and column names can be 31 bytes but RDBMS only allows 30.
3. The RMU/EXTRACT command can write the SQL definitions of objects within a Rdb database to a text file.
RELATED DOCUMENTS
SQL*Net for Rdb
Oracle Rdb Guide to SQL*Net for Rdb
Oracle Rdb Oracle SQL/Services Release Notes
Oracle Rdb A Comparison of SQL Dialects for Oracle and Oracle Rdb
RMU/EXTRACT and /UNLOAD
Oracle RMU Reference Manual
SQL*Loader
Oracle8 Server Utilities

Migration from Informix to Oracle

Hi,
Could anybody share the case studies/plan/docs related to migrating data from Informix to Oracle.

Hello,
The Oracle® Migration Workbench Reference Guide for Informix Dynamic Server Migrations is avalaible at
http://download.oracle.com/docs/html/B16022_01/toc.htm
Also, you will find a lot of informations on the Informaix migration technet page at
http://www.oracle.com/technetwork/database/migration/informix-085032.html
Even if a lot of samples are Microsoft SQL Server based, they also apply on an Informix migration as well.
Hope it will help
Regards,
Jean-Patrick

Migration data from SAP DB2 to Oracle 10g

Hi , I am assigned to migrate data from SAP system which is using DB2 to Oracle 10g.I not very familiar with SAP. I hope someone can help me., especially for those familiar in SAP.
Please help me.
thanks
jebatco

Hello,
just migrating a DB2 database to Oracle 10g might be an easy task. The Oracle Migration Workbench is the tool for such a migration:
http://www.oracle.com/technology/tech/migration/workbench/index.html
I have no idea about SAP, and that might complicate the picture. But there exist specialists for this task:
Oracle Expertise in the SAP environment
The Solution Center SAP Support and Service – located in Walldorf – offers SAP
customers the following services:
• Advanced Customer Services (ACS)
• Performance Analysis and Tuning
• Development of concepts for Backup/Restore/Recovery, and High Availability,
Administration
• Security concepts
• Optimizing of ABAP/4 programs (performance improvement)
• Migration service for customers, who want to use Oracle as the database for SAP
applications (from Informix, MaxDB, DB2, or SQL Server to Oracle).
• Migration services from “Oracle to Oracle” (e.g. Tru64 to HP_UX)
• Integration-Products and –Services
• Oracle Database: The Database of Choice for Deploying SAP Solutions
This is taken from http://www.oracle.com/newsletters/sap/docs/ora4sap-db-of-choice.090213.pdf
Best regards
Wolfgang

How to only migrate data from SQL Server 2008 to Oracle 11?

According to our requirement, We need to only migrate data from a SQL Server database to an existed
Oracle database user.
1) I tried to do it with SQL Developer 3.0.04 Migration Wizard, But find an issue.
My SQL Server database name is SCDS41P2, and my Oracle database user name is CDS41P2;
When I used SQL Developer to do offline move data by Migration Wizard, I found all oracle user
name in movedata files which gotten by run Migration Wizard
is dbo_SCDS41P2. If the Oracle user name is not the same as my existed Oracle user name,
the data can't be moved to my existed Oracle user when I run oracle_ctl.bat in command line window.
So I had to modify the Oracle user name in all movedata files, but it's difficult to modify them because there are many tables in
databases. So could you please tell me how to get the movedata files which the oracle user name in them is my
expected Oracle user name?
2) I also tried to use the 'copy to Oracle' function to copy the SQL Server database tables data
to the existed Oracle database user. When clicked 'copy to Oracle', I selected 'Include Data' and 'Replace' option
But I found some tables can't be copied, the error info is as below:
Table SPSSCMOR_CONTROLTABLE Failed. Message: ORA-00955: name is already used by an existing object
Could you please tell me how to deal with this kind of error?
Thanks!
Edited by: 870587 on Jul 6, 2011 2:57 AM

Hi,
Thanks for you replying. But the 'copy to oracle' function still can't be work well. I will give some info about the table. I also search 'SPSSCMOR_CONTROLTABLE' in the target schema, and only find one object. So why say 'name is already used by an existing object'? Could you please give me some advice? Thanks!
What is the 'Build' version of your SQL*Developer ?
[Answer]:
3.0.04
- what does describe show for the SPSSCMOR_CONTROLTABLE in SQL*Server ?
[Answer]:
USE [SCDS41P2]
GO
/****** Object: Table [dbo].[SPSSCMOR_CONTROLTABLE] Script Date: 07/18/2011 01:25:05 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[SPSSCMOR_CONTROLTABLE](
     [tablename] [nvarchar](128) NOT NULL,
PRIMARY KEY CLUSTERED
     [tablename] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
- what does describe show for the SPSSCMOR_CONTROLTABLE in Oracle ?
[Answer]:
-- File created - Monday-July-18-2011
-- DDL for Table SPSSCMOR_CONTROLTABLE
CREATE TABLE "CDS41P2"."SPSSCMOR_CONTROLTABLE"
(     "TABLENAME" NVARCHAR2(128)
) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;
-- DDL for Index SYS_C009547
CREATE UNIQUE INDEX "CDS41P2"."SYS_C009547" ON "CDS41P2"."SPSSCMOR_CONTROLTABLE" ("TABLENAME")
PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;
-- Constraints for Table SPSSCMOR_CONTROLTABLE
ALTER TABLE "CDS41P2"."SPSSCMOR_CONTROLTABLE" MODIFY ("TABLENAME" NOT NULL ENABLE);
ALTER TABLE "CDS41P2"."SPSSCMOR_CONTROLTABLE" ADD PRIMARY KEY ("TABLENAME")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ENABLE;
Edited by: 870587 on Jul 18, 2011 1:42 AM

How can I migrate data from SQL Server 6,5 to Oracle 8?

We have a web site based on Microsoft SQL Server 6.5.Now we plan
to migrate the database to Oracle 8.
We have redesigned the tables structure and created tables under
Oracle 8, so we only need to migrate data from SQL Server.
We've exported data from SQL Server to text files.
How can we import data from files and restore to Oracle tables.
Is there a solution which let us to import data for particular
table columns,not all columns?
We'll be appreciated if somene can give suggestions.
Regards
Michael
null

Thank you for your reply.
I'll try the Oracle sqlloader utility first.
Regards
Micahel
Oracle Migration Workbench Team wrote:
: Michael,
: Oracle sqlloader is user for this sort of operation, see
: Oracle8i Utilities
: Release 8.1.5
: A67792-01
: available online through Oracle Technology Network.
: The Oracle Migration Workbench can be used to create bcp and
: sqlloader scripts, though since you have altered the schema
these
: scripts would need to be altered by hand after generation.
: Some thought has been put into redesigning table structures in
: the Oracle Migration Workbench, but currently it looks like
this
: reengineering will be left to be done by other tools, eg
Oracle
: Designer, once the SQLServer database has been duplicated with
as
: little change as possible onto Oracle.
: Hope that helps,
: Turloch
: Oracle Migration Workbench Team
: Michael (guest) wrote:
: : We have a web site based on Microsoft SQL Server 6.5.Now we
: plan
: : to migrate the database to Oracle 8.
: : We have redesigned the tables structure and created tables
: under
: : Oracle 8, so we only need to migrate data from SQL Server.
: : We've exported data from SQL Server to text files.
: : How can we import data from files and restore to Oracle
tables.
: : Is there a solution which let us to import data for
particular
: : table columns,not all columns?
: : We'll be appreciated if somene can give suggestions.
: : Regards
: : Michael
: Oracle Technology Network
: http://technet.oracle.com
null

What methods are available to migrate Data from MS SQL to Oracle DB 11g.

Hi,
Need to know the No of ways/ Techniques via we can Migrate data from MS SQL Server to Oracle DB 11g.
Thanks ,
NL

hi,
i came across this link in oracle demos :
http://st-curriculum.oracle.com/obe/db/hol08/sqldev_migration/mssqlserver/migrate_microsoft_sqlserver_otn.htm
the migration process using sql developer
br,
mrak

Migrating data from Oracle 9i to SQL Server 2005

I am new to both. I need to first migrate data from oracle to sql server. After this I need to create a daily nightly batch process to insert new records from oracle to sql server into that table.
As my knowledge in SQL server is zero. Can somebody help me how I can accomplish this.
Somebody told me that I can use sql server import/export to do initial data dump into sql server and after that I can create a link in in oracle to do new iserts for new records. does any one have some example on this. I will really apprecite this if someone can give me step by step example. Thanks

I have been to SQL Server training, but my SQL server databases are off the shelf system, so I don't have to muck with them. Anyway, Sql Server is just MS Access on steroids, so some of the same concepts apply. You need to create an external table links to oracle. The following tidbits I found by googling might help you.
http://www.sqlmag.com/Article/ArticleID/22264/sql_server_22264.html
http://www.lazydba.com/sql/1__152.html
http://www.sswug.org/see/35034
http://decipherinfosys.wordpress.com/2007/07/16/linked-servers-in-sql-server/
Some of the above require subscriptions (free and or paid). Hope this helps.

Faster way to migrate data from SQL Server to Oracle 10g

We have to migrate data from SQL Server to Oracle 10 g.
One particular table on SQL Server has records around 1.25 millions.
We tried moving data using DTS package, but looks it will take hours with current speed of 300 records/minute.
This table has TEXT column, which has XML strings stored. I am not sure, if this is the reason for slow migration.
Would you please suggest better options to migrate it faster?
Thanks in advance !!!

Have you tried Migration work bench?

Issues Migrating Data from SQL Server to Oracle

Good morning, I'm currently trying to migrate data from a SQL Server 7 Database to Oracle 11GR1.
I've followed the steps outlined in the guide that's on OTN and for the most part it worked well, the Data Model Capture, transformation and generation worked fine but when i try to do an online data migration the parallel DataMove threads stop working, i have no errors at all on the migration log they just don't pickup new tables to migrate data.
After looking at the last tables they tried to migrate i noticed that this happens when the table has a text, timestamp or image column on Sql Server which translate to CLOB, RAW[50] and BLOB columns on Oracle.
I'm i missing something here or just flat out doing something wrong with these datatypes?
Oh btw i'm using SQL Developer 2.1 December Edition plus the jtds 1.2.5 drivers for SQL Server.

As you don't have an error message it is difficult to diagnose. You could perform the offline data load for those failiing tables and continue to use the online method for all others.
Another option would be to log a service request and to provide some demo data to analyse the root cause.

Migrating data from oracle to sql server

I have two databases(Oracle and Sql Server) in my company.
I want to migrate some data on daily basis from Oracle to Sql Server.
what are the best methodologies used to perform this task?
Can we schedule this task on daily basis?
please help me guys

Salma,
First and foremost, you need to understand that there are architectural difference between Oracle and SQL Server (with the major one being the difference between Oracle's PL/SQL and Microsoft's Transact-SQL) thus, it will not be an easy task to migrate data from Oracle Database to SQL Server. As far as the use of tools is concerned, you can utilize the following tools (third party tools not recommended) to achieve this:
Microsoft SQL Server Migration Assistant (Oracle to SQL)
http://www.microsoft.com/sqlserver/2005/en/us/migration-oracle.aspx
Oracle SQL Developer Migration Workbench (SQL to Oracle)
http://www.oracle.com/technology/tech/migration//workbench/index_sqldev_omwb.html
But before proceeding with anything, I would recommend you to read through the following post as it lists down the primary compatibility resources and migration guidelines:
Migrating from Oracle to SQL Server
http://vyaskn.tripod.com/oracle_sql_server_differences_equivalents.htm
Hope this helps.
Regards,
Naveed.

Migrating data from one databaes to oracle?

is there any way to migrate my data from my old/previous database to oracle db.
ie. migrating data from one databaes to another.

If you are using Oracle 9i, look at external tables. Otherwise, dumping your data to text files and using SQL*Loader to load it into Oracle tables is a good option. There are various tools and utilities you might look into, including ODBC and migration toolkit. I prefer the SQL*Loader method for DBase, FoxPro, and Access.

Migrating Data from Informix to oracle

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