IT WGU C170 Performance Assessment
IT WGU C170 Performance Assessment Section 1 First Normal Form I gathered all the data from the sales invoice and created an unnormalized dataset. I determined the primary key that provided me with a unique value for all my records in this table. I used composite primary keys because both keys would be able to uniquely identify all the data in the table. Finally, I removed all the repeating groups and made the address atomic by creating separate fields for each one. There is a multivalued key, so I looked for partial dependencies on part of this key. I had a partial dependency on Donut Order ID. I appropriated everything that was dependent on the Donut Order ID and generated a second table with them. I did the same for Donut ID and separated the rest into the Quantity table to provide a link between the two. Donut Order Quantity Donut Donut Order (PK) Customer ID Last Name First Name Street Address Apt # City State Zip Code Home Phone Mobile Phone Other Phone Notes Order Date Donut Order (PK)(FK) Donut ID (PK)(FK) Quantity Donut ID (PK) Name Description Unit Price
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