PHP MySQL Aggregate COUNT

PHP MySQL Aggregate Function COUNT()

Aggregate Function Count() counts the total number of rows.

Syntax

SELECT COUNT(em.id) as total FROM employee em

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 COUNT(em.id) as total FROM employee em";

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

echo mysql_result($result, 0);

mysql_close($connection);
?> 

Output

12

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5. Create Table
6. Insert Record
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10. Query Single Record
11. Query Multiple Records
12. Query Uses LIMIT
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1. Create Two Tables for this section tutorial
2. Query Uses AND Operator
3. Query Uses OR Operator
4. Query Uses INNER JOIN
5. Query Uses LEFT OUTER JOIN
6. Query Uses RIGHT OUTER JOIN
7. Query with Subquery

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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2. PHP MySQL Insert Date
3. PHP MySQL Query Date