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Normalizing address table

I'm working on a database design and trying to normalize my address table (see the attached image of my database diagram).  I have a contact table that is a 1-to-many relationship to my address table.  A contact can have a mailing address and a shipping address.  Should I create another table for the type of address?  What is the best approach to normalizing my address table for the type of address?  I suppose I could just add another column to the address table to specify if it is a mailing or shipping address, but I'm wondering the if the better approach would be to create a separate table for the type of address (mailing or shipping).  

Also, I'm trying to figure out how to create a session table.  For example, if someone logs into the application and then gets timed out, how can I keep their session login information so when they come back to the application it remembers who they are and can take them right back to where they were in the application.  Is there an article that explains how to create/store a users session information for retrieval and brining them back to the application where they were and continuing where they left off?

Thanks for any help.
Regards.database design
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-Dman100-
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-Dman100-
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1 Solution
 
Lee SavidgeCommented:
Personally I'd have a link table and I wouldn't link the address directly to the contact. Go via the link table and have the type in there with a owerID field because you may wish to link an address at some point to a bank and a contact. This way, your type is held in the link table and you have one address while specifying one address. Most CRM systems do it this way.
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-Dman100-Author Commented:
Hi Lee,

Thanks for responding to my post.  Can you clarify what you mean by link table?  I'm assuming you mean a table that sits between the contact table and the address table, correct?  Would that table just have the "Address Type" field (shipping or mailing) and Id field, and address Id field and a contact Id field?  Am I understanding that correctly?

Any thoughts on how to create a session table?

Thanks again for your help!
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-Dman100-Author Commented:
See the updated database diagram using a linked table.  Is this what you meant?

Thanks.
9-24-2014-10-44-31-AM.jpg
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