PHP MySQL Aggregate SUM

PHP MySQL Aggregate Function SUM()

The Aggregate Function SUM() adds all the rows.

Syntax

SELECT SUM(salary) as total_salary
FROM employee_salary;

Example 1

<?php

define('HOST', 'localhost');
define('USER', 'root');
define('PASS', 'yeething');
define('DBNAME', 'woowood');

$connection = mysql_connect(HOST, USER, PASS)
		  or die("can not connect to the server!<br/>");


$rdb = mysql_select_db(DBNAME)
		  or die("The " . DBNAME . "database could not be selected");

$sel_query = "SELECT SUM(salary) as total_salary
FROM employee_salary";

$result = mysql_query($sel_query, $connection) or die(mysql_error($connection));

echo mysql_result($result, 0);

mysql_close($connection);
?> 

Output

388

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• PHP and MySQL Tutorial
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2. Query Uses AND Operator
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4. Query Uses INNER JOIN
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1. MySQL Aggregate Count
2. MySQL Aggregate SUM
3. MySQL Aggregate MAX
4. MySQL Aggregate MIN
5. MySQL Aggregate AVG
6. MySQL Query Uses GROUP BY
7. MySQL Query Uses Having

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