Last entry in a PHP database ID colum (primary key) [duplicate] - php

Question

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Most efficient way to get table row count
(12 answers)
Closed 8 years ago.
How can I get the highest number in my ID column?
With MySQL I have the connection part done I just need to know how I can display that number using PHP. I got some of my code from a friend:
<?php
$con = mysql_connect("quollcraft.net", "quollcr1_forum", "pw");
if (!$con) {
die('Could not connect: ' . mysql_error());
}
mysql_select_db("quollcr1_hub", $con);
$result = mysql_query("SELECT * FROM recentplayers ORDER BY id DESC LIMIT 28");
echo "<table>";
while ($row = mysql_fetch_array($result))
echo "<td>";
echo "<center>";
echo '<img class="avatar" src="http://cravatar.eu/avatar/' . $row ['name'] . '/40.png" rel="tooltip" style="display: inline-block" title="' . $row ['name'] . '">';
echo "</td>";
echo "</table>";
mysql_close($con);
?>
<?php
$con = mysql_connect("quollcraft.net", "quollcr1_forum", "pw");
if (!$con) {
die('Could not connect: ' . mysql_error());
}
mysql_select_db("quollcr1_hub", $con);
$result = mysql_query("SELECT * FROM id ORDER BY id DESC LIMIT 1");
echo "<table>";
while ($row = mysql_fetch_array($result))
echo "<td>";
echo "<center>";
echo "<p>' . $row ['id'] . 'hello</p>";
echo "</td>";
echo "</table>";
mysql_close($con);
?>`
Its supposed to show my latest players then the total players i have.

Answer 1

You can use the aggregate function MAX() to find the maximum value in a column:
SELECT MAX(ID) as ID
FROM TableName

Answer 2

If you want the full row with the highest id not only the id, this would give you that
SELECT * FROM table ORDER BY id DESC LIMIT 1
If you want the id as the only value you can do
SELECT MAX(id) as id FROM table
If you want the total amount of rows in the table, to figure out how many players you have you can do
SELECT COUNT(id) as total_players FROM table

Answer 3

SELECT MAX(YOUR COLUMN) FROM YOUR TABLE

Answer 4

MySQL query should look like this
SELECT id FROM table ORDER BY id DESC LIMIT 1
The solution with MAX may not be the best one when you have multiple records in database.
I don't know how you connect to your MySQL in PHP so it depends how you will display those max id in PHP

Answer 5

You can also use this:
SELECT id FROM YOUR_TABLE WHERE id = LAST_INSERT_ID();