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               |                | 
+-------------+--------------+------+-----+-----------------+----------------+ 
 
 
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