Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

MySQL MAX(), AVG(), and MIN() not working in PHP

Posted on 2009-07-01
1
Medium Priority
?
541 Views
Last Modified: 2013-12-13
Hey,

Whenever I run this script something is going wrong because the max(), avg(), and min() values are coming up as 0. I have run is_null() on all of them and they are not NULL. They are just coming up as 0, but they shouldn't be. 1 vote has been "4" and 1 vote has been "2" so I should be coming up with an avg of 3, max of 4 and min of 2. I can only get COUNT() to work in the statement below, which is giving me the correct answer of 2.

Thanks. Any help is appreciated.
$get_advice_sql = "SELECT a.ID, a.person_ID, a.type, a.keywords, a.title, a.information, a.effect_start, Count(v.vote), Avg(v.vote), Max(v.vote), Min(v.vote), u.clsUserName
				FROM articles as a 
				LEFT JOIN USERTABLE as u ON u.clsUserID = a.person_id
				LEFT JOIN votes as v ON a.ID = v.article_ID
				WHERE a.type = 'advice'
				AND a.ID = (SELECT max(ID) 
							FROM articles
							WHERE type = 'advice')
				GROUP BY a.ID";
	if ($result = mysqli_query($mysqli, $get_advice_sql)) {
		while ($row = mysqli_fetch_row($result)) {
				$advice_id = $row[0];
				$title = $row[4];
				$information = $row[5];
				$effect_start = $row[6];
				$votes_count = $row[7];
				$votes_average = $row[8];
				$votes_max = $row[9];
				$votes_min = $row[10];
				$author = $row[11];		
		}
	}

Open in new window

0
Comment
Question by:Sucao
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 

Accepted Solution

by:
Sucao earned 0 total points
ID: 24755805
Sorry, I posted this question and realized that it was actually a problem while I was putting the initial data into MySQL. I was putting in the votes as 0's so of course it was coming up with 0 for the max, min, and average!

Feeling like an idiot :/

Sorry guys
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When table data gets too large to manage or queries take too long to execute the solution is often to buy bigger hardware or assign more CPUs and memory resources to the machine to solve the problem. However, the best, cheapest and most effective so…
Originally, this post was published on Monitis Blog, you can check it here . In business circles, we sometimes hear that today is the “age of the customer.” And so it is. Thanks to the enormous advances over the past few years in consumer techno…
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question