Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> comp.databases.theory -> Re: Interesting article: In the Beginning: An RDBMS history

Re: Interesting article: In the Beginning: An RDBMS history

From: Jon Heggland <jon.heggland_at_idi.ntnu.no>
Date: Fri, 07 Apr 2006 21:56:45 +0200
Message-ID: <e16g5q$475$1@orkan.itea.ntnu.no> 





dawn wrote:


> Yes, when doing set operations on an ordered set of attributes,

> everything is handled as if the ordering were not there.  So, the

> ordering is irrelevant to SQL,




FYI: SQL's set operations are based on attribute ordering. There are
variant set operations in the standard that are based on attribute names
instead (a CORRESPONDING keyword, IIRC), but I don't know if anyone have
implemented them.

-- 
Jon


Received on Fri Apr 07 2006 - 14:56:45 CDT












Original text of this message













  HOME |
  ASK QUESTION |
  ADD INFO |
  SEARCH |
  E-MAIL US