MySQL database structure - one-to-many-many

[eluser]srisa[/eluser]
How about this approach

Code:

tbl_users
--------------
id - int auto_increment primary key
username

tbl_business
-------------
id - int auto_increment primary key
businessname

tbl_type
-------------------------------
id - int auto_increment primary key
typename
(Sample data: 1-users, 2-business) unique

tbl_phone
----------------------------------------------
type - references tbl_type(id)
id   - (references tbl_users(id) or tbl_business(id))
phone - phone number
primary(type, id, phone)