Re: COUNT and OUTER JOIN results

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



thank you for explaining this to me Amit.  It works.  Ron

The Verse of the Day
âEncouragement from Godâs Wordâ
http://www.TheVerseOfTheDay.info  


From: Amit Tandon 
Sent: Friday, May 06, 2011 5:49 AM
To: Ron Piggott 
Cc: php-db@xxxxxxxxxxxxx 
Subject: Re:  COUNT and OUTER JOIN results

Dear Ron

Take your condition to ON cluause. So your on clause (for LEFT JOIN) would read something like

ON `prayer_request_category`.` 
reference` = `prayer_requests`.`prayer_request_category_reference`
AND 

`prayer_requests`.`approval_ 
level` IN ( 1, 3 )
`prayer_requests`.`prayer_request_type` = 1




============
regds
amit

"The difference between fiction and reality? Fiction has to make sense."



On Fri, May 6, 2011 at 2:42 PM, Ron Piggott <ron.piggott@xxxxxxxxxxxxxxxxxx> wrote:

  The following query returns all 8 prayer request categories with the total # of requests every submitted to each category:

  SELECT `prayer_request_category`.`reference` , `prayer_request_category`.`category` , COUNT( `prayer_requests`.`reference` ) AS category_request_count
  FROM `prayer_request_category`
  LEFT OUTER JOIN `prayer_requests` ON `prayer_request_category`.`reference` = `prayer_requests`.`prayer_request_category_reference`
  GROUP BY `prayer_request_category`.`reference`
  ORDER BY `prayer_request_category`.`category` ASC

  I would like to add the following 2 WHERE conditions to this query so only the live prayer requests are included in the COUNT:

  `prayer_requests`.`approval_level` IN ( 1, 3 )
  `prayer_requests`.`prayer_request_type` = 1

  When I do this only the categories with live prayer requests are returned, instead of all 8 categories.  Is there a way to build these WHERE conditions which will still allow all 8 categories to be included in the result?
  Thank you,

  Ron

  The Verse of the Day
  âEncouragement from Godâs Wordâ
  http://www.TheVerseOfTheDay.info 

  -- 
  PHP Database Mailing List (http://www.php.net/)
  To unsubscribe, visit: http://www.php.net/unsub.php



[Index of Archives]     [PHP Home]     [PHP Users]     [Postgresql Discussion]     [Kernel Newbies]     [Postgresql]     [Yosemite News]

  Powered by Linux