Sorting hostname values correctly in right-to-left fashion:

       
mysql>
mysql> CREATE TABLE hostname
    -> (
    ->  name    VARCHAR(64)
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql> INSERT INTO hostname (name)
    ->  VALUES
    ->          ('cvs.php.net'),
    ->          ('dbi.perl.org'),
    ->          ('lists.mysql.com'),
    ->          ('mysql.com'),
    ->          ('jakarta.apache.org'),
    ->          ('www.kitebird.com')
    -> ;
Query OK, 6 rows affected (0.00 sec)
Records: 6  Duplicates: 0  Warnings: 0

mysql>
mysql> SELECT name FROM hostname
    -> ORDER BY
    -> SUBSTRING_INDEX(name,'.',-1),
    -> SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT('.',name),'.',-2),'.',1),
    -> SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT('..',name),'.',-3),'.',1);
+--------------------+
| name               |
+--------------------+
| www.kitebird.com   |
| mysql.com          |
| lists.mysql.com    |
| cvs.php.net        |
| jakarta.apache.org |
| dbi.perl.org       |
+--------------------+
6 rows in set (0.00 sec)

mysql>
mysql> drop table hostname;
Query OK, 0 rows affected (0.00 sec)

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Sorting hostname values correctly in right-to-left fashion: : Sort Order « Select Clause « SQL / MySQL

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