Simple database design - of the Suggestions?

I built a sample non-real life data base for an auto Agency. The Agency has, model cars, some sellers and buyers. I have to keep track of each of them.

Here's the process I took during the design:
Standards 1, 2 and 3NF, and relationship to an and the other to many...

Column of italics is primary key...

The database is not realistic, I did it for the practice of the purpose. If you please, look at the diagram and tell me do you think its OK so far? or the design is wrong?

This is my schema:

Vendor table stores the information from the Publisher:

* Seller Table {+ SellerID + (number), first name (text), family name name (text), address (text), city (text), CountryID (foreign key), hired to date (date)} *.

Table Customer stores customer information, the client can deal with a seller at a time, while a seller can deal with more than one customer at a time:

* Customer Table {+ CustomerID (number), first name (text), name of family (text), address (text), city (text), (foreign key) CountryID, SellerID (foreign key)} *.

Car table stores information about the cars available:

* Car Table {+ CarID (number), manufacturer (text), model (text), car year (text)} *.

Bought car table hold information about customers who bought a car and a car of type were purchased and the date of purchase (date of purchase is based on CarID and CustomerID field):

* Bought car Table {CarID + (foreign key) + CustomerID (foreign key), purchase date (date)} *.

OR

* Bought car Table {+ PurchasedCarID + (number), CarID (foreign key), CustomerID (foreign key), date (date of purchase)} *.

-----

* Country table {CountryID + (number), name of the country (text)} *.

A customer and a seller can store several phone number:

* Phone of Table {PhoneID + (number), CustomerID (foreign key), phone number (text)} *.

If I want a salesman to store more than one number, should I do a new table that stores the sellers phone numbers? Or there is a better way to do?

Note: I created country table and table of phone number because they are considered as multivalued fields. To achieve 1NF, I must leave each field in the table (e.g. seller and customer) be atomic.

It would be better if you post real DDL for the proposed tables.

Tags: Database

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    at oracle.dbtools.crest.model.metadata.XMLTransformationManager.openDesignPart(XMLTransformationManager.java:3545)

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    Julio.

  • recover the database up to the time, ORA-600 [2619]

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    ---------- -----------------

    1 20141008 10:40:46

    2 20141008 10:40:46

    ...


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    DBA oracle drwxr-xr-x 2 512 8 Oct 11:35.

    DBA oracle drwxr-xr-x 4 512 8 Oct 09:01...

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    -rw - r - 1 oracle dba M 174, 8 Oct 11:04 arch_598882_1_527943760.dbf

    -rw - r - 1 oracle dba M 175, 8 Oct 11:04 arch_598883_1_527943760.dbf

    -rw - r - 1 oracle dba 169M 8 Oct 11:04 arch_598884_1_527943760.dbf

    -rw - r - 1 oracle dba 168M 8 Oct 11:04 arch_598885_1_527943760.dbf

    -rw - r - 1 oracle dba 168M 8 Oct 11:04 arch_598886_1_527943760.dbf

    -rw - r - 1 oracle dba 200M 8 Oct 11:04 arch_598887_1_527943760.dbf

    -rw - r - 1 oracle dba M 121, 8 Oct 11:34 arch_598888_1_527943760.dbf

    -rw - r - 1 oracle dba 200M 8 Oct 11:35 arch_598889_1_527943760.dbf

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  • Oracle database design

    Hello

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    Created everything in the topology Manager is stored in the master repository, not the individual repositories work and is available for all deposits of jobs attached to Mr. aster rep if you have a physical connection differnet you want for your repository only execution, you create another server of data with the connection details and an associated physical schema. You can then create another context and use it to associate your new physical dataserver with the same logical schema that references your database server your designer rep work references:

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