The database tables descriptions are as follows.
1) db table "chat" description.
+-----------+--------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------------------+----------------+
| __id | int(4) | | PRI | NULL | auto_increment |
| sesId | varchar(128) | | | | |
| user | varchar(64) | | | | |
| room_name | varchar(128) | | | Main Room | |
| __login | datetime | | | 0000-00-00 00:00:00 | |
| __logout | datetime | | | 0000-00-00 00:00:00 | |
| ip | varchar(15) | | | 000.000.000.000 | |
+-----------+--------------+------+-----+---------------------+----------------+
2) db table "rooms" description
+-------------+--------------+------+-----+-----------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+-----------------+----------------+
| __id | int(4) | | PRI | NULL | auto_increment |
| room_name | varchar(128) | | | Main Room | |
| creator | varchar(64) | | | | |
| no_of_users | int(3) | | | 0 | |
| ip | varchar(15) | | | 000.000.000.000 | |
| status | tinyint(1) | | | 0 | |
+-------------+--------------+------+-----+-----------------+----------------+
|