规范化地址表建议

Question

Hope this is an acceptable question as not a programming question as such.

I have a database with several tables

Student Teacher Parents Staff

All need to have a reference to an address table

Address - door number - street - town - city - postcode

My question is :-

How can I create a address table with little duplication of data. Is the only way to have separate tables tables for each?

Hope you guys can advise.

Answer 1

Have a separate Address table with the following columns

address_id
door_number
street
town
city
state
country
postcode

Now in each of the tables - Student , Parent , Teacher , Staff - have an address_id column and create a foreign key to the address_id in the address table.

Assuming Student and Parent are already related, you can have the address just in the Parents table.