How to reorder the rows in a table?

Is it possible to incorporate reordering feature of the SelectOrderShuttle to a table like the following picture?
http://picasaweb.google.com/lh/photo/c-UAWCac_2ySw_VQj16GEQ?feat=directlink
Thanks.

sb92075 wrote:
The order of columns within row make NO difference to performance; with possible exception of LOB datatypeThat's not strictly true.
Given a badly designed application you may find a change in column order can make a worthwhile difference to performance. The note in question is aimed specifically at Demantra, and make the following point:
<ul>
Due to the way the Oracle RDBMS stores data physically on disk, it is possible to reduce storage and improve performance by rebuilding large tables that have many NULL-value or empty columns, to the end of the row. This is known as reordering.
</ul>
This describes a classic bad design - blaming the problems on Oracle, of course.
But if you do have very long rows (especially with more than 254 columns), and you do leave vary large numbers of columns null, then rearranging the most frequently null columns to the end of the row can make a difference. I've done it a couple of times.
The OP seems to be talking about the (generally silly) guideline to rebuild the table in primary key order, though, and there is an entertaining (but apparently broken) script that gives a meaningless number that is supposed to show how badly ordered the table is with respect to the primary key. (Personally I would just look at the clustering_factor of the primary key - it's quicker, easier, and more likely to be appropriate).
Regards
Jonathan Lewis

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