WGU C170 Data Management - Applications Performance Assessment.
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Cours
WGU C170
Établissement
WGU C170
Sales order 1NF
WGU C170 Data Management - Applications Performance Assessment.
EXPLANATION:
I am going to call this table the "Order Table" I also need to make sure that this table contains a primary Key, in this particular table I am going to make the “OrderID” and “DonutID” t...
Data Management – Applications – C170 Performance Assessment.
Cesar R Gutierrez
Student ID: 000703502
WGU C170 Data Management -
Applications Performance
Assessment.
Sales order
1NF
EXPLANATION:
I am going to call this table the "Order Table" I also need to make sure that this table contains a primary Key, in this particular table I
am going to make the “OrderID” and “DonutID” the Primary Key (composite key), the reason I chose to use OrderID and DonutID as
the primary key is because Order ID or DonutID by themselves do not guarantee Uniqueness but when combined uniqueness is
achieved. I am going to separate city, state and zip in order to make the data atomic with no repeating groups. I am also going to get
rid of Customer since there is already a Customer ID field and customer will most likely be a table of its own. I left the Donut name
and description empty because my table was starting to be too big to fit it in this document.
Orde Custome OrderDat First Last Street Apt City State Zip Home Mobile Other Donu Qt Donu Descriptio Unit Note
r ID r ID (PK) e Nam Nam addres # phone phone phone t ID y t n price s
e e s Nam
e
1 2 9/1/17 John Perez 12th ST #4 Austi Texa 1234 123456789 12345678 12345678 1 1 $1.5 None
n s 5 1 9 9 0
th
1 2 9/1/17 John Perez 12 ST #4 Austi Texa 1234 123456789 12345678 12345678 2 5 $1.7 None
n s 5 9 9 5
1 2 9/1/17 John Perez 12th ST #4 Austi Texa 1234 123456789 12345678 12345678 3 12 $1.7 None
n s 5 9 9 5
1 2 9/1/17 John Perez 12th ST #4 Austi Texa 1234 123456789 12345678 12345678 4 3 $1.7 None
n s 5 9 9 5
1 2 9/1/17 John Perez 12th ST #4 Austi Texa 1234 123456789 12345678 12345678 5 4 $1.7 None
n s 5 9 9 5
1 2 9/1/17 John Perez 12th ST #4 Austi Texa 1234 123456789 12345678 12345678 6 5 $2.0 None
n s 5 9 9
1|Page
,Data Management – Applications – C170 Performance Assessment.
Cesar R Gutierrez
Student ID: 000703502
Sales Order 2NF
EXPLANATION
In Second Form I need to have fulfilled 1NF and ensure that No functional dependencies exist, in order to accomplish that I need to
Separate Donut ID and Order ID and create their own tables and since Quantity can cause a many to many relationship To resolve
that issue I will create the OrderLineItem table in which OrderID and DonutID will be the PK, however since OrderID and Donut ID
are the primary keys for their own respective tables they are also Foreign keys in the OrderLineItem table and therefore reference
their own table as FK in orderlineitem table . In the Order Table I have chosen to use Order ID as the Primary Key since the Order
table most likely will contain order related information like customer ID Order ID the Date and the notes.
Orders Table
Order ID Custo OrderDate First Last Street Apt# City State Zip Home Mobile Other Notes
(PK) mer Name Name address phone phone phone
ID
1 2 9/1/17 John Perez 12th ST #4 Austin Texas 12345 1234567891 123456789 123456789 None
Order Line Item Table
Order ID (PK) (FK) Donut ID (PK) (FK) Quantity
1 1 1
1 2 5
1 3 12
1 4 3
1 5 4
1 6 5
2|Page
, Data Management – Applications – C170 Performance Assessment.
Cesar R Gutierrez
Student ID: 000703502
Sales Order 3NF
EXPLANATION:
There was no need to have all the customer information as it is redundant so I removed it. I also created two more tables one to house the
information that does not need to be in Order table like Donut ID, Quantity, Donut name, Description or unit prize that information needs to go
in to separate tables. The quantity of each line item is defined with the combination of the Order ID and the Donut ID, so that information was
separated into the Order Line Item table. The Name, Description, and Unit Price of each donut can be defined by a Donut ID, so that was
separated into a table to reduce redundancy. A customer will most likely have more than one order if we were to leave the customer ID in the
Order table the customer information will be repeated for each of their orders. To avoid this the customer table was created that way the
customer information is only added once. In Order Table the PK is OrderID and the FK is CustomerID. In Order Line Item table the OrderID and
DonutID are the PK and also FKs. In Donut table the DonutID is the PK and in the customer table the CustomerID is the PK.
Order Table
Order Custo OrderDate Notes
ID (PK) merID
(FK)
1011 0001 9/10/17 None
Order Line Item Table
Order ID (PK) (FK) Donut ID (PK) (FK) Quantity
1 1 1
1 2 5
1 3 12
1 4 3
1 5 4
1 6 5
3|Page
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