Solved

Get counts from mysql database

Posted on 2011-03-20
5
243 Views
Last Modified: 2012-05-11
My table has following structure (along with few other columns)
product      a1    a2     a3   a4
abc            yes      no      yes      no
pqr            yes      yes      no      yes
xyz            yes      yes      yes      yes

I need to run a query which will return the total count of yes:
product      count
abc              2
pqr               3
xyz              4

How can i return the same using PHP mySQL.
0
Comment
Question by:nainil
[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
5 Comments
 
LVL 9

Expert Comment

by:AriMc
ID: 35176216
I don't think that kind of query can be done with standard SQL but you could apply
the method and PHP-code described here:

http://www.dynamicdrive.com/forums/showthread.php?t=41946

0
 
LVL 9

Expert Comment

by:fcontrepois
ID: 35176263
sql is done to work on rows not on columns, so I'll say that this work is more for the php part.

this code is written as is directly in this textarea without testing so I probably forgot a ; or something else but the logic is good (I hope)

<?php

mysql_connect("localhost", "mysql_user", "mysql_password") or
    die("Could not connect: " . mysql_error());
mysql_select_db("mydb");

$result = mysql_query("SELECT * FROM mytable");

while ($row = mysql_fetch_array($result, MYSQL_NUM)) {
$product=$row[0];
$yes=0;
for ($i=1; $i<count($row); $i++){
  if($row[$i]=="yes"){ $yes++;}
}  

printf("Product: %s  Yesses: %s", $product, $yes);  
}

mysql_free_result($result);

?>

0
 
LVL 39

Accepted Solution

by:
Aaron Tomosky earned 500 total points
ID: 35176380
It can be done in SQL with a case statement and group by.
Here is the idea but I'm sure my syntax is a little off as I'm on my phone
Select product, sum(case when a1='yes'  then 1 else 0 end
+ case when a2 ='yes') as totalyes group by product
0
 

Author Comment

by:nainil
ID: 35176474
Thank you aarontomosky. It worked like a charm. Nice to learn something new :)
0
 
LVL 9

Expert Comment

by:fcontrepois
ID: 35176788
really case made it to mysql , I'll sleep being less stupid tonight
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

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

Containers like Docker and Rocket are getting more popular every day. In my conversations with customers, they consistently ask what containers are and how they can use them in their environment. If you’re as curious as most people, read on. . .
This post contains step-by-step instructions for setting up alerting in Percona Monitoring and Management (PMM) using Grafana.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

710 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