Each BANK has a unique Code, as well as a Name and Address. Each BANK is related to one or more BANK-BRANCHes, and the BranhNo is unique among each set of BANK-BRANCHes that are related to the same BANK. Each BANK-BRANCH has an Address. Each BANK-BRANCH has zero or more LOANS and zero or more ACCTS. Each ACCOUNT has an AcctNo (unique), Balance, and Type and is related to exactly one BANK-BRANCH and to at least one CUSTOMER. Each LOAN has a LoanNo

Each BANK has a unique Code, as well as a Name and Address. Each BANK is related to one or more BANK-BRANCHes, and the BranhNo is unique among each set of BANK-BRANCHes that are related to the same BANK. Each BANK-BRANCH has an Address. Each BANK-BRANCH has zero or more LOANS and zero or more ACCTS. Each ACCOUNT has an AcctNo (unique), Balance, and Type and is related to exactly one BANK-BRANCH and to at least one CUSTOMER. Each LOAN has a LoanNo

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.

Question

Cardinality ratios often dictate the detailed design of a database. The cardinality ratio depends on
the real-world meaning of the entity types involved and is defined by the specific application. For the
following binary relationships, suggest cardinality ratios based on the following description of the
mini-world:
Each BANK has a unique Code, as well as a Name and Address. Each BANK is related to one or more
BANK-BRANCHes, and the BranhNo is unique among each set of BANK-BRANCHes that are related
to the same BANK. Each BANK-BRANCH has an Address. Each BANK-BRANCH has zero or more
LOANS and zero or more ACCTS. Each ACCOUNT has an AcctNo (unique), Balance, and Type and is
related to exactly one BANK-BRANCH and to at least one CUSTOMER. Each LOAN has a LoanNo
(unique), Amount, and Type and is related to exactly one BANK-BRANCH and to at least one
CUSTOMER. Each CUSTOMER has an SSN (unique), Name, Phone, and Address, and is related to
zero or more ACCOUNTS and to zero or more LOANS.
BANK:BANK-BRANCH
ACCOUNT:CUSTOMER
LOAN:CUSTOMER
BANCK-BRANCH:LOAN
[Choose ]
[Choose ]
[Choose ]
[Choose ]
<
>
<

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