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    Database Normalization

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    Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this information. Next, apply normalization to reduce this table to third normal form. Prepare a Word document showing the original and final tables. Include a short summary (2-3 paragraphs) of the problems with the original single table design and how normalization improved the design.
    Orders:
    ? Order_id
    ? Order_date
    ? Customer_id
    ? Customer_name
    ? Customer_address
    ? Customer_city
    ? Customer_state
    ? Item_id
    ? Item_description
    ? Item_qty
    ? Item_price
    ? Item_total_price
    ? Order_total_price

    Please consider the following functional dependencies (FDs):
    Order_Id -> Customer_id, Order_date, Order_total_price
    Item_Id, Order_Id -> Item_Qty, Item_total_price, Item_description, Item_Price
    Customer_id -> Customer_Name, Customer_Address, Customer_City, Customer_State
    Item_Id -> Item_description, Item_price
    You will use these FDs as you analyze the table for normalization.
    Also, we do not want to loose any information (e.g. Order_total_price is potential derivable from other pieces of data, we want that field to show up in one of the resulting tables).

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    https://brainmass.com/computer-science/databases/database-normalization-129583

    Solution Preview

    The above columns can be divided into 4 tables of each in 3 NF as shown below. Check the attached document for ...

    Solution Summary

    This solution clearly explains Database Normalization concepts using an example.

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