Solved

SUM values from two tables and echo in PHP

Posted on 2013-01-18
4
656 Views
Last Modified: 2013-01-18
Hello Experts.

I have one database with two tables. Need to SUM the values from those two tables and echo it in an <td>.

My current code:

//QUERY SUM RESULT FROM FIRST TABLE (empresas);

$query_emp = "SELECT Employees_n, SUM(Employees_n) FROM empresas";
$result_emp = mysql_query($query_emp);

//ECHO SUM IN A <TD>

while($row = mysql_fetch_array($result_emp)){
	echo "<td>" . $row['SUM(Employees_n)'] . "</td>";
}

////////////////////////////////////////////////////////////////////////////////////////////

//QUERY SUM RESULT FROM SECOND TABLE (anon_empresas);

$query_emp_an = "SELECT Employees_n, SUM(Employees_n) FROM anon_empresas";
$result_emp_an = mysql_query($query_emp_an);

//ECHO SUM IN A <TD>

while($row = mysql_fetch_array($result_emp_an)){
	echo "<td>" . $row['SUM(Employees_n)'] . "</td>";
}



//HOW TO ECHO IN A <TD> THE SUM OF BOTH $row['SUM(Employees_n)']??

Open in new window


What I need is to echo a <td> with the SUM of "Employees_n" from empresas and "Employees_n" from anon_empresas;

Just add the two SUMS and echo in a td;


Thanks a lot
0
Comment
Question by:joao_c
  • 2
  • 2
4 Comments
 
LVL 108

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 38793798
Does it matter if you do one query or two?  Untested code, but probably close.

//QUERY SUM RESULT FROM FIRST TABLE (empresas);
$query_emp = "SELECT SUM(Employees_n) AS sum_e FROM empresas";
$result_emp = mysql_query($query_emp);
$row = mysql_fetch_assoc($result_emp);
$sum_e = $row['sum_e'];

//QUERY SUM RESULT FROM SECOND TABLE (anon_empresas);
$query_emp_an = "SELECT SUM(Employees_n) AS sum_a FROM anon_empresas";
$result_emp_an = mysql_query($query_emp_an);
$row = mysql_fetch_assoc($result_emp_an);
$sum_a = $row['sum_a'];

// ADD THE NUMBERS
$total = $sum_e + $sum_a;

// PUT THE VARIABLE INTO A TD-TAG
echo '<td>' . $total . '</td>';

Open in new window

0
 

Author Closing Comment

by:joao_c
ID: 38793887
Can't thank you enough. :)
0
 
LVL 108

Expert Comment

by:Ray Paseur
ID: 38793958
Thanks for the points and thanks for using EE.  You might want to grab a copy of this book.  It will help you get some structured learning in the art.
http://www.sitepoint.com/books/phpmysql5/

Yank's writing is very readable with great examples, and a code library you can download and modify for your own use.  Now in its fifth printing, it's been a permanent part of my professional library since Edition One.

Best regards, ~Ray
0
 

Author Comment

by:joao_c
ID: 38794897
I will buy that book, looks great. EE was really helpfull, and I already earn some points too. :D
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

This article discusses how to create an extensible mechanism for linked drop downs.
Finding original email is quite difficult due to their duplicates. From this article, you will come to know why multiple duplicates of same emails appear and how to delete duplicate emails from Outlook securely and instantly while vital emails remai…
The viewer will receive an overview of the basics of CSS showing inline styles. In the head tags set up your style tags: (CODE) Reference the nav tag and set your properties.: (CODE) Set the reference for the UL element and styles for it to ensu…
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 …

929 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now