Date:         Tue, 17 Feb 1998 17:42:52 +0000
Reply-To:     John Whittington <medisci@POWERNET.COM>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         John Whittington <medisci@POWERNET.COM>
Subject:      Re: SQL-set theory
Comments: To: "Zuckier, Gerald" <Zuckier@CHIME.ORG>
Content-Type: text/plain; charset="us-ascii"

At 12:08 17/02/98 -0500, Zuckier, Gerald wrote:
 
>well, if you're going to go Boolean,
>outer union = (A and B) or (A and not B) or (not A and B)
 
Maybe it's just that it's getting too alte in the (UK) day for me to think
straight - but doesn't that little lot simplify to (A or B) ?
 
Regards,
 
John
 
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