I'm trying to create a database to store product and customer information.
An item have many batch numbers (batch ID)
a batch number can only belong to one item
an item can be in many products
a product contains many items
an order can contain many products
a product can be in many orders
a customer can have many orders
an order can only be for one customer
from this information i have created the following relationships. http://postimage.org/image/2fva2x890/
Is this all correct?? i think the relationship between batch ID in tbl_batch is wrong??
Cheers in advance
