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Re: porting data from oracle to mysql
Posted by: Josh Chamas ()
Date: November 16, 2004 06:54PM

manish singh wrote:
> hi
> iam new to mysql and i have a question regarding
> porting/moving data from
> oracle database/s to my sql database.
> the scenario is likethis:
> we have 3 oracle databases and we have proposed
> a unified reporting environment
> where data from all these databases will be moved
> in one mysql db and then reports
> will be generated.
> now what are the things to keep in mind while
> pushing data from
> oracle to mysql and what are the different ways in
> which this can achieved efficiently?

If you are using a generic database API like JDBC or DBI, this is easy to create your own custom ETL process, but there are tool vendors like Embarcadero DT/Studio ( http://www.embarcadero.com ) that can also help with this. If you write your own program, consider either using multi-row insert statements of the form

insert into TABLE (col1, col2) values (row1, row1), (row2, row2), ..., (rowN, rowN)

to insert say 5000 rows in just one insert statement. Or build a text tab delimited file for use with LOAD DATA INFILE command.

Also consider the important decision between using InnoDB and MyISAM storage engine types for your tables. MyISAM can be very good for reporting where you do not need ACID transactional integrity whereas InnoDB gives you this, but at a cost of some per row overhead which can be substantial for long & narrow fact tables. Also MyISAM supports MERGE tables which can be used to give you a form of table partitioning if you are building a data warehouse.

BTW, if you do end up picking MyISAM + MERGE for partitioning and reporting, I think you will have a near ideal reporting environment, and a very good application of MySQL in your database infrastructure.

Regards,

Josh

Josh Chamas
Director, Professional Services
MySQL Inc., www.mysql.com
Get More with MySQL! http://www.mysql.com/consulting

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Subject Views Written By Posted
porting data from oracle to mysql 14823 manish singh 10/25/2004 12:26AM
Re: porting data from oracle to mysql 12140 Josh Chamas 11/16/2004 06:54PM
Re: porting data from oracle to mysql 42358 frank_alw 11/16/2004 09:47PM
Re: porting data from oracle to mysql 13388 manish singh 11/17/2004 09:54PM
Re: porting data from oracle to mysql 9625 Josh Chamas 11/17/2004 11:36PM
Re: porting data from oracle to mysql 7290 manish singh 11/21/2004 10:05PM
Re: porting data from oracle to mysql 12857 Josh Chamas 11/22/2004 04:18PM
Re: porting data from oracle to mysql 5962 manish singh 11/23/2004 12:29AM
Re: porting data from oracle to mysql 5297 Josh Chamas 11/23/2004 01:07PM
Re: porting data from oracle to mysql 5060 manish singh 11/23/2004 11:39PM
Re: porting data from oracle to mysql 5329 Josh Chamas 11/24/2004 12:06AM
Re: porting data from oracle to mysql 4394 manish singh 11/24/2004 02:10AM
Re: porting data from oracle to mysql 5537 Josh Chamas 11/24/2004 03:36AM
Re: porting data from oracle to mysql 3872 manish singh 11/24/2004 04:43AM
Re: porting data from oracle to mysql 4242 Josh Chamas 11/24/2004 03:49PM
Re: porting data from oracle to mysql 4340 manish singh 11/25/2004 01:52AM
Re: porting data from oracle to mysql 4376 linda hashim 01/13/2005 01:42AM
accessing oracle data through mysql 21142 sujata chaudhari 04/17/2005 05:35PM
Re: accessing oracle data through mysql 9963 Josh Chamas 04/19/2005 12:07AM
Re: accessing oracle data through mysql 6795 Jim Bessolo 09/05/2007 10:18AM
Re: accessing oracle data through mysql 7404 Ryan A 01/14/2008 02:38PM
Compare data in oracle with the data in SQL 7728 Veena V 01/22/2008 06:23PM
Re: porting data from oracle to mysql 5676 Fabian Hess 04/25/2005 08:55AM
Re: porting data from oracle to mysql 5933 raj k 02/09/2005 01:22AM
Re: porting data from oracle to mysql 5419 frank_alw 02/10/2005 05:18PM
Re: porting data from oracle to mysql 5431 michael kirchsteiger 09/07/2005 11:45PM
Re: porting data from oracle to mysql 5626 Ekta Jain 03/14/2007 03:02AM
Re: porting data from oracle to mysql 5120 Itamar Sion 02/06/2009 02:07PM


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