The max value in a column with php - php

Question

I have a MySql table "MyTable" with the column "order"
order
-----
3
4
2
1
I want to get the highest number. The sql statement works well inside MySql:
SELECT MAX(order) FROM MyTable"
But I do not know how to use it with php and echo it? Something like:
$result = mysqli_query($con, "SELECT MAX(order) FROM MyTable");

Answer 1

$result = mysqli_query($con, "SELECT MAX(order) FROM MyTable");
$row = mysqli_fetch_array($result);
echo $row[0];

Answer 2

If you don't provide an alias to a MySQL function it will be shown as you've written it:
$row = mysqli_fetch_array($result);
echo $row['MAX(order)'];
What you can do is write something like:
$result = mysqli_query($con, "SELECT MAX(order) as 'max' FROM MyTable");
$row = mysqli_fetch_array($result);
echo $row['max'];
Which is using an alias.
Hope this helps!

Answer 3

Alternatively you can use ORDER BY DESC and Limit result to 1 this way you can easily get the maximum of an column .
$result=$con->query("SELECT order FROM MyTable ORDER BY order DESC LIMIT 1");
$row=mysqli_fetch_array($result);
echo $row['order'];
Or using MAX
$result = mysqli_query($con, "SELECT MAX(order) FROM MyTable");
$row=mysqli_fetch_array($result);
echo $row[0];

Answer 4

This tutorial is directly from tizag, using the MySql Max function
MySQL Aggregate Functions - MAX()
// Make a MySQL Connection
$query = "SELECT type, MAX(price) FROM products GROUP BY type";
$result = mysql_query($query) or die(mysql_error());
// Print out result
while($row = mysql_fetch_array($result)){
echo "The most expensive ". $row['type']. " is $" .$row['MAX(price)'];
echo "<br />";
}

Answer 5

Here's my answer:
$host = "localhost";
$username = "your_username";
$password = "your_password";
$db_name = "your_db_name";
$connection = mysql_connect($host, $username, $password) or die ("Error:: [1]");
mysql_select_db($db_name, $connection) or die ("Error:: [2]");
$query = "SELECT `order` FROM `MyTable` order by `order` desc";
$res = mysql_query($query, $connection);
$row = mysql_fetch_array($res);
print $row[0];
With this query , you always have the highest value of the give column.