erd - Basic Database design question - 1 attribute three Entities -


Can someone please clarify something that I still need to know?

If I have three surviving organizations, directors and company secretaries and everyone has primary primary address, I

If I was modeling a conceptual ERD then I would have to separate each unit Should be the property of 'primary address' or should I know the fourth institution, the primary address should be added and they have to do PK> FK? / P>

Since then, this link has been found which I want to know everything.

I will do something like this, the primary address refers to the location of the organization:

Table: Organization

Org_Key {PK},
Org_Name,
Primary Address Field,
Any Other Fields

Table: Personnel

Person_Key {PK},
Org_Key {FK},
Status {Directory, Secretary, etc.},
Any other field

In my opinion, in fact There is no need to separate people who are "secretaries" because they are "directors" because they Both employees of a specific organization.

Now, if you have a personal address (i.e., the address of a person's home) from the primary address, then I will add additional fields to the Personnel table


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