Question

LEFT JOIN WHERE DATE > NOW Problem

Asked by: phper

I have a table of venues and a table of shows. The shows table include shows that are older then NOW(). I'm trying to show all the venues in alphbetically order and then show any shows at the venue that are greater than now.

I can LEFT JOIN the two tables. But if I include DATE(show_date) >= NOW() it excludes venues that where show dates have past. So I took out the 'DATE(show_date) >= NOW() ' and added a 'IF > Now' in the page. But because I'm GROUP BY venue name  the query is selecting the first show date, so now no shows are showing.

What I trying to do is:
venues LEFT JOIN shows ON ... WHERE show date >= now. But with all of the venues showing. Here is my current query. Also this query is the one for the page that shows all venues begining with a number. 

SELECT venues.vid,venues.VenName,
shows.shband,
shows.shbid,
venues.VenAddress,
venues.VenCity, 
DATE_FORMAT(shows.shdate, '%c/%e %l:%i%p') AS shdatef, 
shows.shdate
FROM venues LEFT Join shows ON venues.vid = shows.shvid WHERE (venues.VenName LIKE '0%' OR venues.VenName LIKE '1%' OR venues.VenName LIKE '2%' OR venues.VenName LIKE '3%' OR venues.VenName LIKE '4%' OR venues.VenName LIKE '5%' OR venues.VenName LIKE '6%' OR venues.VenName LIKE '7%' OR venues.VenName LIKE '8%' OR venues.VenName LIKE '9%')  AND shows.shsame is null GROUP BY venues.VenName ORDER BY venues.VenName, shows.shdate ASC

                                  
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Asked On
2008-03-07 at 12:01:02ID23223929
Tags

PHP

Topics

PHP and Databases

,

MySQL Server

Participating Experts
1
Points
500
Comments
1

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    Answers

     

    by: dsackerPosted on 2008-03-07 at 12:59:12ID: 21074086

    I think all you needed to do was add the date criteria onto your LEFT JOIN and not within your WHERE. Check my snippet solution (also I've shortened your criteria for the beginning number, if you like).

    SELECT	venues.vid,
	venues.VenName,
	shows.shband,
	shows.shbid,
	venues.VenAddress,
	venues.VenCity, 
	DATE_FORMAT(shows.shdate, '%c/%e %l:%i%p') AS shdatef, 
	shows.shdate
FROM	venues
LEFT JOIN shows ON venues.vid = shows.shvid AND shows.shdate >= NOW()
WHERE	SUBSTRING(venues.VenName,1,1) between '0' and '9'
AND	shows.shsame is null
GROUP BY venues.VenName
ORDER BY venues.VenName,
	shows.shdate ASC

                                              
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