RE: count(*) = 0 and I still need the row

From: William Rogge <William_Rogge_at_voltek.com>
Date: Thu, 16 Nov 2000 15:53:53 -0500
Message-Id: <10682.122305@fatcity.com>

Since you added another condition related to the outer joined table, it also must reflect the outer join:

        AND pv.VIEW_DATE (+) > add_months(SYSDATE, -1);

Good luck.

-----Original Message-----

From:	Dave Morgan [SMTP:dmorgan_at_bartertrust.com]
Sent:	Thursday, November 16, 2000 2:10 PM
To:	Multiple recipients of list ORACLE-L
Subject:	count(*) = 0 and I still need the row

Hi All,
	Thanks to Javier, Ron, William and Deepak for their efforts
	I have not tried Ron's solution of pre-setting the variable 
	yet, thats next.

I have tried outer joins:
        SELECT
                hp.URL,
		nvl(count(pv.HTML_PAGE_ID),0)
        FROM PAGE_VIEWS pv, HTMP_PAGE hp
        WHERE hp.PAGE_ID = pv.HTML_PAGE_ID(+)
	GROUP BY hp.URL

Returns 
	The HideAway    	       1
	The Townsend                   0
	Tony's Place                   0	
	Yet Another                    0
	available                      0
	creepy condo's                 2
	slumpers                       3
	twomonthsago                   2

Add in the date restriction:
        SELECT 
		hp.URL,
		nvl(count(pv.HTML_PAGE_ID),0)
        FROM PAGE_VIEWS pv, HTMP_PAGE hp
        WHERE hp.PAGE_ID = pv.HTML_PAGE_ID (+)
        AND pv.VIEW_DATE > add_months(SYSDATE, -1);
	GROUP BY hp.URL

Returns 
	The HideAway    	       1
	creepy condo's                 2
	slumpers                       3

And people believe I know what I'm doing????

It does process the row "twomonthsago" semi-properly as those pageviews are more than 1 month ago. (Yes the data was created to be meaningful) I say semi-properly because it should display

	twomonthsago                   0
 

Anyone know why the the date test alters the outer join results?

TIA
Dave
--

Dave Morgan
Senior Database Administrator
Internet Barter Inc.
www.bartertrust.com
408-982-8774
--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author: Dave Morgan
  INET: dmorgan_at_bartertrust.com

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