only echoing the last 4 things inserted into a MYSQL database - php

Question

ive got this script that echos the information from a mysql database.
now it all works fine but i only want to echo the last 4 statements inserted
this is the script
<?php
mysql_connect("localhost", "root", "root") or die(mysql_error());
mysql_select_db("blog") or die(mysql_error());
$result = mysql_query("SELECT * FROM blog")
or die(mysql_error());
echo "<table border='1'>";
echo "<tr> <th>Name</th> <th>Age</th> </tr>";
while($row = mysql_fetch_array( $result )) {
echo "<tr><td>";
echo $row['id'];
echo "</td><td>";
echo $row['username'];
echo "</td></tr>";
}
echo "</table>";
?>

Answer 1

Modify your mysql query (i assume that each entry as an ascending id):
SELECT * FROM blog
ORDER BY id DESC
LIMIT 4;
But this will get them in reverse order. If you want them in correct order you can do:
SELECT *
FROM (
SELECT * FROM blog
ORDER BY id DESC
LIMIT 4
) last_four
ORDER BY id ASC;

Answer 2

If you have an auto-incremented column as an id for each blog post, you could sort on the id in descending order. Use a query like this
mysql_query("SELECT * FROM blog ORDER BY your_id_column DESC LIMIT 4")

Answer 3

Assuming your blog table has a column called created, which contains the post's creation date, this query should do what you need:
SELECT * FROM blog ORDER BY created DESC LIMIT 4
This will order your posts by the most recently created post (time-wise), and will only return the first 4 rows fetched from the table.

Answer 4

You would do this with the query, changing the query to something like:
select * from blog order by blog_id desc limit 4
you'll have to change blog_id to whatever you use.

Answer 5

use this query which will order the records by ID in descending order and fetch only last 4 by using limit.
SELECT * FROM blog order by ID DESC LIMIT 4

Answer 6

You can restrict your SELECT using LIMIT and ORDER BY, but in order to help, we'd need to know a bit more about the database structure. Can you provide the results of "DESCRIBE blog;"?
If your "id" field is set up with auto_increment, then it's a good bet that higher numbers of that field indicate more recent posts. Showing output in reverse order ("ORDER BY id DESC") and restricting the number ("LIMIT 4") should be fairly straightforward.
SELECT * FROM blog ORDER BY id DESC LIMIT 4;
Check out the precise structure of the SELECT command at the MySQL documentation.

Answer 7

<?php
mysql_connect("localhost", "root", "root") or die(mysql_error());
mysql_select_db("blog") or die(mysql_error());
$result = mysql_query("SELECT * FROM `blog` ORDER BY `id` DESC LIMIT 4") or die(mysql_error());
echo "<table border='1'>";
echo "<tr> <th>Name</th> <th>Age</th> </tr>";
while($row = mysql_fetch_array( $result )) {
echo "<tr><td>";
echo $row['id'];
echo "</td><td>";
echo $row['username'];
echo "</td></tr>";
}
echo "</table>";
?>
Just copy and paste the code. I believe the code will works good. Thanks