For the following bank database,
Banking Example
branch (branch_name, branch_city, assets)
customer (customer-name, customer_street, customer_only)
account (account_number, branch_name, balance)
loan (loan_number, branch_name, amount)
depositor (customer_name, account_number)
borrower (customer_name, loan_number)
A- it is required to draw ERD with relations
B- use SQL commands to create the tables and answer the following s
1- Find all loans of over $1200 ?
σamount > 1200 (loan)
select *
from loan
where amount>1200;
-2 - Find the loan number for each loan of an amount greater than
$1200?
πloan-number (σamount > 1200 (loan))
select loan_number
from loan
where amount>1200;
3- Find the names of all customers who have a loan, an account, or both, from the
bank
∏customer-name (σ (borrower)) U ∏customer-name (σ (depositor))
Select borrower .customer_name, depositor .customer_name
From borrower, depositor;
4- Find the names of all customers who have a loan and an account at bank
∏customer-name (borrower) ∩ ∏customer-name (depositor)
Select borrower .customer_name, depositor .customer_name
From borrower, depositor
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