Sorting Dotted-Quad IP Values in Numeric Order : Sort Order « Select Clause « SQL / MySQL

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SQL / MySQL » Select Clause » Sort Order 
Sorting Dotted-Quad IP Values in Numeric Order
       
mysql>
mysql> CREATE TABLE hostip
    -> (
    ->  ip      VARCHAR(64)
    -> );
Query OK, rows affected (0.00 sec)

mysql>
mysql> INSERT INTO hostip (ip)
    ->  VALUES
    ->          ('127.0.0.1'),
    ->          ('192.168.0.2'),
    ->          ('192.168.0.10'),
    ->          ('192.168.1.2'),
    ->          ('192.168.1.10'),
    ->          ('255.255.255.255'),
    ->          ('21.0.0.1')
    -> ;
Query OK, rows affected (0.00 sec)
Records: 7  Duplicates: 0  Warnings: 0

mysql>
mysql> SELECT ip FROM hostip
    -> ORDER BY
    -> SUBSTRING_INDEX(ip,'.',1)+0,
    -> SUBSTRING_INDEX(SUBSTRING_INDEX(ip,'.',-3),'.',1)+0,
    -> SUBSTRING_INDEX(SUBSTRING_INDEX(ip,'.',-2),'.',1)+0,
    -> SUBSTRING_INDEX(ip,'.',-1)+0;
+-----------------+
| ip              |
+-----------------+
21.0.0.1        |
127.0.0.1       |
192.168.0.2     |
192.168.0.10    |
192.168.1.2     |
192.168.1.10    |
255.255.255.255 |
+-----------------+
rows in set (0.00 sec)

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

   
    
    
    
    
    
    
  
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