Something

mysql> desc taxation;
+------------------+---------------+------+-----+---------+-------+
| Field            | Type          | Null | Key | Default | Extra |
+------------------+---------------+------+-----+---------+-------+
| called_number    | char(50)      |      | PRI |         |       |
| call_start       | timestamp(14) | YES  | PRI | NULL    |       |
| duration         | int(11)       |      | PRI | 0       |       |
| tariffdesc       | char(50)      |      |     |         |       |
| id_route         | int(11)       |      | PRI | 0       |       |
| source_peer_name | char(50)      |      | PRI |         |       |
| gateway_name     | char(50)      |      | PRI |         |       |
| cost             | double        |      |     | 0       |       |
| sell             | double        |      |     | 0       |       |
+------------------+---------------+------+-----+---------+-------+
9 rows in set (0.00 sec)