Question

Attribute Name	Sample Value	Sample Value	Sample Value
MEMBER_NUM	214	235	214
MEMBER_NAME	Alice B. VanderVoort	Gerald M. Gallega	Alice B. VanderVoort
MEMBER_ADDRESS	325 Meadow Park	123 Rose Court	325 Meadow Park
MEMBER_CITY	Murkywater	Highlight	Murkywater
MEMBER_ZIPCODE	12345	12349	12345
INVITE_NUM	8	9	10
INVITE_DATE	23-Feb-2018	12-Mar-2018	23-Feb-2018
ACCEPT_DATE	27-Feb-2018	15-Mar-2018	27-Feb-2018
DINNER_DATE	15-Mar-2018	17-Mar-2018	15-Mar-2018
DINNER_ATTENDED	Yes	Yes	No
DINNER_CODE	DI5	DI5	DI2
DINNER_DESCRIPTION	Glowing Sea Delight	Glowing Sea Delight	Ranch Superb
ENTREE_CODE	EN3	EN3	EN5
ENTREE_DESCRIPTION	Stuffed crab	Stuffed crab	Marinated steak
DESERT_CODE	DE8	DE5	DE2
DESERT_DESCRIPTION	Chocolate mousse with raspberry sauce	Cherries Jubilee	Apple pie with honey crust

1. Is this in 1NF? Why or why not? If it isn’t, then what change(s) need to be made to ensure it’s in 1NF?
2. Break this down to 2NF, and eventually 3NF by clearly working through the functional dependencies, partial dependencies and any transient dependencies to arrive at your final tables.

Answer 1

a) The table is in first normal form, as it contains atomic values, and no row has more than one value.

b) To break it down to second normal form we need to check for functional dependencies. Let's make a different table for dinner code and description.

Attribute Name	Sample Value	Sample Value	Sample Value
MEMBER_NUM	214	235	214
MEMBER_NAME	Alice B. VanderVoort	Gerald M. Gallega	Alice B. VanderVoort
MEMBER_ADDRESS	325 Meadow Park	123 Rose Court	325 Meadow Park
MEMBER_CITY	Murkywater	Highlight	Murkywater
MEMBER_ZIPCODE	12345	12349	12345
INVITE_NUM	8	9	10
INVITE_DATE	23-Feb-2018	12-Mar-2018	23-Feb-2018
ACCEPT_DATE	27-Feb-2018	15-Mar-2018	27-Feb-2018
DINNER_DATE	15-Mar-2018	17-Mar-2018	15-Mar-2018
DINNER_ATTENDED	Yes	Yes	No
ENTREE_CODE	EN3	EN3	EN5
ENTREE_DESCRIPTION	Stuffed crab	Stuffed crab	Marinated steak
DESERT_CODE	DE8	DE5	DE2
DESERT_DESCRIPTION	Chocolate mousse with raspberry sauce	Cherries Jubilee	Apple pie with honey crust

MEMBER_NUM	214	214	235
DINNER_CODE	DI5	DI2	DI5
DINNER_DESCRIPTION	Glowing Sea Delight	Ranch Superb	Glowing Sea Delight

3 normal form

Attribute Name	Sample Value	Sample Value	Sample Value
MEMBER_NUM	214	235	214
MEMBER_NAME	Alice B. VanderVoort	Gerald M. Gallega	Alice B. VanderVoort
INVITE_NUM	8	9	10
INVITE_DATE	23-Feb-2018	12-Mar-2018	23-Feb-2018
ACCEPT_DATE	27-Feb-2018	15-Mar-2018	27-Feb-2018
DINNER_DATE	15-Mar-2018	17-Mar-2018	15-Mar-2018
DINNER_ATTENDED	Yes	Yes	No

MEMBER_NUM	214	235
MEMBER_ADDRESS	325 Meadow Park	123 Rose Court
MEMBER_CITY	Murkywater	Highlight
MEMBER_ZIPCODE	12345	12349

MEMBER_NUM	214	214	235
DINNER_CODE	DI5	DI2	DI5
DINNER_DESCRIPTION	Glowing Sea Delight	Ranch Superb	Glowing Sea Delight

MEMBER_NUM	214	214	235
ENTREE_CODE	EN3	EN5	EN3
ENTREE_DESCRIPTION	Stuffed crab	Marinated steak	Stuffed crab

MEMBER_NUM	214	214	235
DESERT_CODE	DE8	DE2	DE5
DESERT_DESCRIPTION	Chocolate mousse with raspberry sauce	Apple pie with honey crust	Cherries Jubilee