CUSTOMERID INT (fk)
DONUT_ORDER_ID INT (pk)
ers Q
NU
OA
TE
N
S
TIV
TY
AR
TC
AH
BL
A
E
R (255)
QUANTITY INT
DONUT_ORDER_ID INT (pk) (fk)
DONUT_ID INT (pk)(fk)
1NF 2NF
Highlighted fields will form a
Composite primary key. City
State and Zip were separated
And are now atomic
DONUT ORDER ID (PK)
(FK)
QUANTITY
DONUT ID (PK)(FK)
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
of
Keys.
transitive dependency. New table has 2
the PKs from the other tables as Foreign
ER DIAGRAM
Each table has a primary key which can refer to another one of the
tables in this group.
ORDER TABLE
DATE DATETIME
1:M
One Customer can place many Ord
Customer table has single pk
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 NAME
DONUT ORDER
ID(PK)
DATE
CUSTOMER ID
LAST NAME
FIRST NAME
STREET ADDRESS
APT
CITY
STATE
ZIP CODE
HOME PHONE
MOBILE PHONE
OTHER PHONE
NOTES
DONUT ID (PK)
DONUT NAME
DONUT DESCRIPTION
UNIT PRICE
CUSTOMER ID (PK)
LAST NAME
FIRST NAME
STREET ADDRESS
APT
CITY
STATE
ZIP CODE
HOME PHONE
MOBILE PHONE
OTHER PHONE
DATE
CUSTOMER ID (FK)
NOTES
DONUT ORDER ID
(PK)
DONUT ORDER ID
(PK)(FK)
QUANTITY
DONUT ID (PK)(FK)
DONUT ID (PK)
DONUT NAME
DONUT
DESCRIPTION
UNIT PRICE
