Exam (elaborations)
WGU IT C170 PROJECT - Western Governors University
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WGU IT C170 PROJECT - Western Governors University
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1NF 2NF Highlighted fields will form a Composite primary key. CityState and Zip were separated
And are now atomic
No duplicate data, each of the above tables has a Primary Key, and a key (foreign) that can refer to another table in the group.
3NF
No transitive dependency. New table has 2 of the PKs from the other tables as Foreign Keys.
Each table has a primary key which can refer to another one of the tables in this group.
1:M
One Customer can place many Orders
ER DIAGRAM Customer table has single pkORDER TABLE
DATE DATETIME
CUSTOMERID INT (fk)
DONUT_ORDER_ID INT (pk)
NOTES VARCHAR (255)QUANTITY TABLE
QUANTITY INT
DONUT_ORDER_ID INT (pk) (fk)
DONUT_ID INT (pk)(fk)DONUT TABLE
DONUT_ID INT (pk)
DONUT_NAME VARCHAR (100)
DONUT_DESCRIPTION VARCHAR (255)
UNIT_PRICE DECIMAL (10,2)DONUT ORDER ID
DONUT ID DATE
CUSTOMER ID
LAST NAME
FIRST NAME
STREET ADDRESS
CITY
STATE
ZIP CODE
HOME PHONE
MOBILE PHONE
OTHER PHONE
DESCRIPTION
QTY
UNIT PRICE
NOTES
DONUT NAMEDONUT ORDER ID(PK)
DATE
CUSTOMER ID
LAST NAME
FIRST NAME
STREET ADDRESS
APT
CITY
STATE
ZIP CODE
HOME PHONE
MOBILE PHONE
OTHER PHONE
NOTESDONUT ID (PK)
DONUT NAME
DONUT DESCRIPTION
UNIT PRICE
DONUT ORDER ID (PK)
(FK)
QUANTITY
DONUT ID (PK)(FK)
CUSTOMER ID (PK)
LAST NAME
FIRST NAME
STREET ADDRESS
APT
CITY
STATE
ZIP CODE
HOME PHONE
MOBILE PHONE
OTHER PHONEDATE
CUSTOMER ID (FK)
NOTES
DONUT ORDER ID (PK)
DONUT ID (PK)
DONUT NAME
DONUT DESCRIPTION
UNIT PRICEDONUT ORDER ID (PK)(FK)
QUANTITY
DONUT ID (PK)(FK)
WGU IT C170 PROJECT - Western Governors University One order can have many different quantities 1:M
One donut order can hold many different quantities of donut types of donut types
1:M
create table customers( customer_id INT,CUSTOMER TABLE
CUSTOMER_ID INT (pk)
LAST_NAME VARCHAR (30)
FIRST_NAME VARCHAR (30)
STREET_ADDRESS VARCHAR (100)
APT INT,
CITY VARCHAR (30)
STATE VARCHAR (30)
ZIP_CODE INT HOME_PHONE VARCHAR (20)
MOBILE_PHONE VARCHAR (20)
OTHER_PHONE VARCHAR (20)
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