Task 2 Analysis of relational schemas and normalization Consider the following conceptual schema of a sample database domain that contains information about users, the type of users and the user's account of an application. NON-REGISTERED preferences [0..*] (i) (ii) USER name address DOB tel [0..*] (iii) (iv) HHH DDD ID ID ID creates REGISTERED regDate benefit [0..*] USERACCOUNT userName password The following are partially completed collection of relational schemas. USER(name, address, DOB, tel[0..*], email [0..*]) USERACCOUNT(userName, password) NON-REGISTERED (preferences[0..*]) REGISTERED (regDate, benefit [0..*]) ID Find all functional and multivalued dependencies in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. Find all minimal keys in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. List the derivations of all minimal keys. For each one of the relational schemas find the highest normal form a schema is in. List the justifications for each highest normal form found. Decompose all relational schemas that are not in 4NF into 4NF. List all relational schemas obtained from the decompositions. Remember to indicate the primary key and foreign keys (if any).
Task 2 Analysis of relational schemas and normalization Consider the following conceptual schema of a sample database domain that contains information about users, the type of users and the user's account of an application. NON-REGISTERED preferences [0..*] (i) (ii) USER name address DOB tel [0..*] (iii) (iv) HHH DDD ID ID ID creates REGISTERED regDate benefit [0..*] USERACCOUNT userName password The following are partially completed collection of relational schemas. USER(name, address, DOB, tel[0..*], email [0..*]) USERACCOUNT(userName, password) NON-REGISTERED (preferences[0..*]) REGISTERED (regDate, benefit [0..*]) ID Find all functional and multivalued dependencies in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. Find all minimal keys in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. List the derivations of all minimal keys. For each one of the relational schemas find the highest normal form a schema is in. List the justifications for each highest normal form found. Decompose all relational schemas that are not in 4NF into 4NF. List all relational schemas obtained from the decompositions. Remember to indicate the primary key and foreign keys (if any).
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![Task 2
Analysis of relational schemas and normalization
Consider the following conceptual schema of a sample database domain that
contains information about users, the type of users and the user's account of an
application.
NON-REGISTERED
preferences [0..*]
(i)
(ii)
USER
name
address
DOB
tel [0..*]
(iii)
(iv)
HHH
DDD
ID
ID
ID
creates
REGISTERED
regDate
benefit [0..*]
USERACCOUNT
userName
password
The following are partially completed collection of relational schemas.
USER(name, address, DOB, tel[0..*], email [0..*])
USERACCOUNT(userName, password)
NON-REGISTERED (preferences[0..*])
REGISTERED (regDate, benefit [0..*])
ID
Find all functional and multivalued dependencies in the relational schemas
USER, USERACCOUNT, NON-REGISTERED, and REGISTERED.
Find all minimal keys in the relational schemas USER, USERACCOUNT,
NON-REGISTERED, and REGISTERED. List the derivations of all minimal
keys.
For each one of the relational schemas find the highest normal form a
schema is in. List the justifications for each highest normal form found.
Decompose all relational schemas that are not in 4NF into 4NF. List all
relational schemas obtained from the decompositions. Remember to
indicate the primary key and foreign keys (if any).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F196c3559-204e-4f47-af11-ba6fa17143b2%2F6a2fd5c4-4724-4390-bd4c-115852ac8a08%2Flus1u2_processed.png&w=3840&q=75)
Transcribed Image Text:Task 2
Analysis of relational schemas and normalization
Consider the following conceptual schema of a sample database domain that
contains information about users, the type of users and the user's account of an
application.
NON-REGISTERED
preferences [0..*]
(i)
(ii)
USER
name
address
DOB
tel [0..*]
(iii)
(iv)
HHH
DDD
ID
ID
ID
creates
REGISTERED
regDate
benefit [0..*]
USERACCOUNT
userName
password
The following are partially completed collection of relational schemas.
USER(name, address, DOB, tel[0..*], email [0..*])
USERACCOUNT(userName, password)
NON-REGISTERED (preferences[0..*])
REGISTERED (regDate, benefit [0..*])
ID
Find all functional and multivalued dependencies in the relational schemas
USER, USERACCOUNT, NON-REGISTERED, and REGISTERED.
Find all minimal keys in the relational schemas USER, USERACCOUNT,
NON-REGISTERED, and REGISTERED. List the derivations of all minimal
keys.
For each one of the relational schemas find the highest normal form a
schema is in. List the justifications for each highest normal form found.
Decompose all relational schemas that are not in 4NF into 4NF. List all
relational schemas obtained from the decompositions. Remember to
indicate the primary key and foreign keys (if any).
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May I ask for part (iii), user -> nonregistered and user -> registered is in which NF? it wasn't clear.
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May I ask for part (iii), user -> nonregistered and user -> registered is in which NF? it wasn't clear. Thank u
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