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RE: Relational Database and Versioning

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Fri, 09 May 2003 09:27:12 -0800
Message-ID: <F001.00595647.20030509092712@fatcity.com>


I do exactly this: adding "version_number" column. But, tables where I need "versioning" are relatively small, so I'm not concerned with extra storage.

Igor Neyman, OCP DBA
ineyman_at_perceptron.com

-----Original Message-----
Gennick
Sent: Friday, May 09, 2003 10:57 AM
To: Multiple recipients of list ORACLE-L

A friend sent me the query below about versioning the data in a database. I thought I'd throw it out to the list and ask what, if any, versioning solutions you see being used.

--

Best regards,

Jonathan Gennick --- Brighten the corner where you are http://Gennick.com * 906.387.1698 * mailto:jonathan@gennick.com

Thursday, May 8, 2003, 10:42:31 PM,
Eric M. Burke (burke_e_at_yahoo.com) wrote: Jonathan,

Can you recommend a book that explains different strategies for implementing data versioning in relational databases? I'm no database expert. My intuition tells me that for each table, I'd want to start by adding an extra column containing a revision number. So each change to the data results in a new row with a new revision.

This seems inefficient, particularly when you have 30 columns and only two fields changed...it results in a lot of redundantly stored data.

I guess I'm just not searching for the right thing, because I cannot find any good info on this topic. I'm mostly interested in "generic" relational/SQL solutions that would work on a variety of databases,


Eric M. Burke
Principal Software Engineer, Object Computing, Inc. O'Reilly Author
314-494-3185 (mobile)
burke_e_at_yahoo.com

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Author: Jonathan Gennick
  INET: jonathan_at_gennick.com

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Author: Igor Neyman
  INET: ineyman_at_perceptron.com

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