2.15 Consider the bank database of Figure 2.18. Give an expression in the relational algebra for each of the following queries: branch(branch_name, branch_city, assets) customer (ID, customer name, customer_street, customer_city) loan (loan_number, branch_name, amount) borrower (ID, loan_number) account (account_number, branch_name, balance) depositor (ID, account_number) Figure 2.18 Bank database. A. Find each loan number with a loan amount greater than $10000. B. Find the ID of each depositor who has an account with a balance greater than $6000. C. Find the ID of each depositor who has an account with a balance greater than $6000 at the "Uptown" branch.
2.15 Consider the bank database of Figure 2.18. Give an expression in the relational algebra for each of the following queries: branch(branch_name, branch_city, assets) customer (ID, customer name, customer_street, customer_city) loan (loan_number, branch_name, amount) borrower (ID, loan_number) account (account_number, branch_name, balance) depositor (ID, account_number) Figure 2.18 Bank database. A. Find each loan number with a loan amount greater than $10000. B. Find the ID of each depositor who has an account with a balance greater than $6000. C. Find the ID of each depositor who has an account with a balance greater than $6000 at the "Uptown" branch.
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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Transcribed Image Text:2.15 Consider the bank database of Figure 2.18. Give an expression in the relational algebra for
each of the following queries:
branch(branch_name, branch_city, assets)
customer (ID, customer name, customer_street, customer_city)
loan (loan_number, branch_name, amount)
borrower (ID, loan_number)
account (account_number, branch_name, balance)
depositor (ID, account_number)
Figure 2.18 Bank database.
A. Find each loan number with a loan amount greater than $10000.
B. Find the ID of each depositor who has an account with a balance greater than $6000.
C. Find the ID of each depositor who has an account with a balance greater than $6000 at the
"Uptown" branch.
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