Consider the ER diagram shown for part of a BANK database. Each bank can have multiple branches, and each branch can have multiple accounts and loans. a. List the strong (nonweak) entity types in the ER diagram. b. Is there a weak entity type? If so, give its name, partial key, and identifying relationship. c. What constraints do the partial key and the identifying relationship of the weak entity type specify in this diagram?

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BANK
Code Name
Addr
Phone
BRANCHES
ACCTS
Acet no
Balance
ACCOUNT
A.C
Name
CUSTOMER
Type
BANK BRANCH
Addr
Addr
Loan no
LOANS
N
LOAN
M
Branch.no
9
Amount
Type
Consider the ER diagram shown for part of a BANK database.
Each bank can have multiple branches, and each branch can have multiple
accounts and loans.
a. List the strong (nonweak) entity types in the ER diagram.
b. Is there a weak entity type? If so, give its name, partial key, and identifying
relationship.
c. What constraints do the partial key and the identifying relationship of the
weak entity type specify in this diagram?
Transcribed Image Text:BANK Code Name Addr Phone BRANCHES ACCTS Acet no Balance ACCOUNT A.C Name CUSTOMER Type BANK BRANCH Addr Addr Loan no LOANS N LOAN M Branch.no 9 Amount Type Consider the ER diagram shown for part of a BANK database. Each bank can have multiple branches, and each branch can have multiple accounts and loans. a. List the strong (nonweak) entity types in the ER diagram. b. Is there a weak entity type? If so, give its name, partial key, and identifying relationship. c. What constraints do the partial key and the identifying relationship of the weak entity type specify in this diagram?
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