Migration from SQL Server to Oracle database

I have got 2 questions:
1. We are planning to convert our OLTP sql server databases to oracle databases. I tried using SQL Developer to migrate a small sql server database to oracle database(size 5Gb). It was fine. when I tried to migrate another database(size 90G), it is taking too long. The problem with sql developer is I cannot choose and pick tables. out of 250 tables, I need to migrate abt 80 tables(size will be abt 50G). can anybody share their experiences, if any, in converting medium size sql server databases to oracle databases? any others options??
2. I am planning to convert sql server ddl to oracle ddl. I am testing bcp out and use sql loader to import the data. Right now, I am manually creating oracle tables from sql server tables. I am using http://download.oracle.com/docs/cd/E11882_01/gateways.112/e12069/apa.htm#BABCIIDI to convert the code. Are there any other better ways to convert sql server DDL to Oracle DDL?
Thanks in advance

DDLs should be converted manually. Oracle is not SQL-Server.
If you for example have the partitioning option, you should consider using partitioning and local indexes where possible. Not all tables need to be hash tables. Do you defer segment creation or not? What is the type of tablespace? Do you set percentages for free and used to manage when the data block is on the free list and how much is reserved in the data block for updating rows in that block?
There are numerous considerations to make in terms of the physical database design.
Using BCP and SQL*Loader sound good. SQL*Loader is fast and scalable - am using it to load up to 3.6 million rows every 60 seconds. Direct and parallel loads provide the best performance in this regard (assuming that the underlying table structure and usage supports this approach).

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Hi,
What about using Oracle SQL Developer for migration
http://www.oracle.com/technetwork/database/migration/sqlserver-095136.html
HTH

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You may want to start by downloading the Oracle Migration Workbench. That generally does a reasonable job in moving the tables, stored procedures, etc. from SQL Server to Oracle. If your VB code is database agnostic, it should continue to work without any more intervention. Realistically, however, you'll rpobably have to at least tweak a few things that don't work the same way in the old ODBC/ OLE DB provider and the new one.
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www.ddbcinc.com

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Hi ,
My requirement is we are planning to migrate the sql server data to oracle.
what is the way to do migration from sql server to oracle. Please let me know if any tools are there for migration.Previous we used sql developer( which is provided by oracle i.e. freeware )
tool but it was created only table structures not ported any data.

Hi,
Oracle sql developer is a great tool for migration from sql server to oracle..
Refer the link,
http://www.oracle.com/technetwork/database/migration/sqlserver-095136.html

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Hi,
what are the general issues to be considered when migrating a database from SQL server to Oracle 8i.
Is it documented on the web/ or any publication
Samit

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The main issues that you have to handle are
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Dear Expert,
I am having problem with SQL server with Oracle.
Problem: I want to merge table records from SQL server to Oracle Table. Which License free tool I can use to achive the goals.
If I able to make a free DB link from Oracle to SQL server , then we can select table and will be able to update.
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Sher

Hi,
What about using Oracle SQL Developer for migration
http://www.oracle.com/technetwork/database/migration/sqlserver-095136.html
HTH

Migrate from sql server to oracle

can anyone help me how to migrate from sqlserver to oracle

Hi;
i have been searching in google if anybody having live experience in migration pl help meOk than i am helping you,checked google search and found below links from search. They should help you friend. Please see:
http://st-curriculum.oracle.com/obe/db/hol08/sqldev_migration/mssqlserver/migrate_microsoft_sqlserver_otn.htm
http://www.oracle.com/technetwork/database/migration/sqlserver-095136.html
Also see:
SQL Server to Oracle migration queries
SQL Server to Oracle migration queries
If have still question than update thread.
Regard
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vhiware wrote:
create table t2 nologging parallel (degree=3) as select * from "dbo"."t1@dblink;
and its taking long time.... but its running...I doubt that parallel processing will be used as this is unique to Oracle (using rowid ranges typically) and not SQL-Server.
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{code}
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Gyan,
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<<<
Online Capture
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>>>
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Giby

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Hi, I am new here,
I would like to ask how to use SQL developer MWB to migration SQL Server to Oracle?
I have go through the doc(s) like: getting start, user's guild, etc. and have following problems
(1), where should the SQL developer installed? in SQL Server side? Oracle side? or any PC with connection to the databases?
(2), do I need to get some plug-in(s) for MWB to work? If yes, which plug-in do I need and where are they?
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Hi Chocobo,
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http://dermotoneill.blogspot.com/2008/06/sql-developer-migration-workbench-151_11.html
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Hi,
I am currently migrating a SQL Server 2005 db to Oracle 10g using SQL Developer 1.2.1. I have created the migration repository, captured the SQL Server db objects, and created the target schema. There are about 109 tables captured. During Data migration, however, the data move hangs. I have run the data move a couple of times now and it does not hang while migrating any particular table, but seems to be more to do with the length of time it is taking to migrate. Could this be an issue with SQL Server connections being lost? The SQL Server db is quite large. Row counts of 100k plus.
Message was edited by:
user596259

Probably. There is an offline option for migrating data under the migration menu. Generate Scripts for the data move using the appropriate converted model and u can export the data to bcp export files and load it with teh generated SQL Loader scripts.

Migrating from SQL Server to Oracle - Emulating SQL Server databases

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Sorry for the delay closing-out this thread but I work from a rural location and we lost our internet service for the two-weeks prior to the holidays. Now back on-line so let's wrap-up.
Oracle and SQLServer are now both being accessed from my ADO.Net application, so a big thanks to all who've helped me with this first use of the forum. Hopefully these final comments might help someone else in turn...
In migrating from SQLServer to Oracle I initially found it hard to stop thinking about accessing multiple databases on a single dataserver and start thinking more about a single instance of a database that supports muliple users, any one of which can be assigned the same schema. While I had used the SQL CREATE command to produce miltiple databases within SQLServer, it serves a completely different purpose for Oracle, creating an entirely new instance that I did not require.
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Thanks again and bye for now.

Migration from SQL Server to Oracle database

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