ORDER BY#
ORDER BY operator is used to sort the output by a certain field, ascending or descending. To do this it should be added to SELECT operator.
If you perform a simple SELECT query, the output is:
new_db.db> SELECT * from switch;
+----------------+----------+------------+-------------------+------------+-----------+
| mac | hostname | model | location | mngmt_ip | mngmt_vid |
+----------------+----------+------------+-------------------+------------+-----------+
| 0010.D1DD.E1EE | sw1 | Cisco 3850 | London, Green Str | 10.255.1.1 | 255 |
| 0020.A2AA.C2CC | sw2 | Cisco 3850 | London, Green Str | 10.255.1.2 | 255 |
| 0040.A4AA.C2CC | sw4 | Cisco 3850 | London, Green Str | 10.255.1.4 | 255 |
| 0050.A5AA.C3CC | sw5 | Cisco 3850 | London, Green Str | 10.255.1.5 | 255 |
| 0060.A6AA.C4CC | sw6 | C3750 | London, Green Str | 10.255.1.6 | 255 |
| 0070.A7AA.C5CC | sw7 | Cisco 3650 | London, Green Str | 10.255.1.7 | 255 |
| 0030.A3AA.C1CC | sw3 | Cisco 3850 | London, Green Str | 10.255.1.3 | 255 |
+----------------+----------+------------+-------------------+------------+-----------+
7 rows in set
Time: 0.039s
With help of ORDER BY operator you can get entries from switch table by sorting them by switch name:
new_db.db> SELECT * from switch ORDER BY hostname ASC;
+----------------+----------+------------+-------------------+------------+-----------+
| mac | hostname | model | location | mngmt_ip | mngmt_vid |
+----------------+----------+------------+-------------------+------------+-----------+
| 0010.D1DD.E1EE | sw1 | Cisco 3850 | London, Green Str | 10.255.1.1 | 255 |
| 0020.A2AA.C2CC | sw2 | Cisco 3850 | London, Green Str | 10.255.1.2 | 255 |
| 0030.A3AA.C1CC | sw3 | Cisco 3850 | London, Green Str | 10.255.1.3 | 255 |
| 0040.A4AA.C2CC | sw4 | Cisco 3850 | London, Green Str | 10.255.1.4 | 255 |
| 0050.A5AA.C3CC | sw5 | Cisco 3850 | London, Green Str | 10.255.1.5 | 255 |
| 0060.A6AA.C4CC | sw6 | C3750 | London, Green Str | 10.255.1.6 | 255 |
| 0070.A7AA.C5CC | sw7 | Cisco 3650 | London, Green Str | 10.255.1.7 | 255 |
+----------------+----------+------------+-------------------+------------+-----------+
7 rows in set
Time: 0.034s
By default, sorting is ascending, so query could be without ASC parameter:
new_db.db> SELECT * from switch ORDER BY hostname;
+----------------+----------+------------+-------------------+------------+-----------+
| mac | hostname | model | location | mngmt_ip | mngmt_vid |
+----------------+----------+------------+-------------------+------------+-----------+
| 0010.D1DD.E1EE | sw1 | Cisco 3850 | London, Green Str | 10.255.1.1 | 255 |
| 0020.A2AA.C2CC | sw2 | Cisco 3850 | London, Green Str | 10.255.1.2 | 255 |
| 0030.A3AA.C1CC | sw3 | Cisco 3850 | London, Green Str | 10.255.1.3 | 255 |
| 0040.A4AA.C2CC | sw4 | Cisco 3850 | London, Green Str | 10.255.1.4 | 255 |
| 0050.A5AA.C3CC | sw5 | Cisco 3850 | London, Green Str | 10.255.1.5 | 255 |
| 0060.A6AA.C4CC | sw6 | C3750 | London, Green Str | 10.255.1.6 | 255 |
| 0070.A7AA.C5CC | sw7 | Cisco 3650 | London, Green Str | 10.255.1.7 | 255 |
+----------------+----------+------------+-------------------+------------+-----------+
7 rows in set
Time: 0.034s
Sorting by IP address descending:
SELECT * from switch ORDER BY mngmt_ip DESC;
+----------------+----------+------------+-------------------+------------+-----------+
| mac | hostname | model | location | mngmt_ip | mngmt_vid |
+----------------+----------+------------+-------------------+------------+-----------+
| 0070.A7AA.C5CC | sw7 | Cisco 3650 | London, Green Str | 10.255.1.7 | 255 |
| 0060.A6AA.C4CC | sw6 | C3750 | London, Green Str | 10.255.1.6 | 255 |
| 0050.A5AA.C3CC | sw5 | Cisco 3850 | London, Green Str | 10.255.1.5 | 255 |
| 0040.A4AA.C2CC | sw4 | Cisco 3850 | London, Green Str | 10.255.1.4 | 255 |
| 0030.A3AA.C1CC | sw3 | Cisco 3850 | London, Green Str | 10.255.1.3 | 255 |
| 0020.A2AA.C2CC | sw2 | Cisco 3850 | London, Green Str | 10.255.1.2 | 255 |
| 0010.D1DD.E1EE | sw1 | Cisco 3850 | London, Green Str | 10.255.1.1 | 255 |
+----------------+----------+------------+-------------------+------------+-----------+
7 rows in set
Time: 0.034s