asp.net - Database design & referential integrity -

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I am preparing a website UI (signup, signin, editing profile, editing address, etc.)

I have created the following tables. My question is, are there any unnecessary columns or tables? In addition, which column would be the primary key and the foreign key to consider the fact that a user can add / edit another address?

I am using three dropdown lists for country code (for mobile number) - CountryCode to newsletter , country (for address) - country name to annuity and state (for address) - StateName to Astaet . Of these, the country code comes on the dropdown signup page. The second 2 address book is on the page that is displayed after the user's login. AUser & amp; AUserAddress will store the table data.

I do not know how I am involved in these tables. Do I include enough / more / fewer columns? What should I change?

UPDATE1: I have updated the database in the following tables / columns. Now how do I establish a relation between the countryode and embection? Country code (marked) ... or I should leave countrycode from Auser if I keep both tables in it then I will store data in 2 places. I do not want to do this ... the problem is the format of the discontinued name and dialing Code (India, for example, +91) looks like. If I leave that column from Ever, how do I store a mobile number then? Maybe I have to break the country code string and it must remove the dialing code piece and store it on the mobile number. It looks very complicated in the mobile column.

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The only relationship you have not found is between AUser and ACountry . Currently, you have countrycode on AUser . Instead, should be CountryID , because it is the primary key of acountry .

In addition, AUserAddress no stateID and not state ? If this is the case then there is no need to be both StateID and country id on that table, you can set the user's country by looking at the relevant code StateID column.

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