Orders(orderId, customerId, dateOrdered, dateRequired, status)

Customer(customerId, customerLastName, customerStreet, customerCity, customerState, customerZip)

OrderDetails(orderId,productId, quantity, lineNumber, amount)

Products(productId, name, description, quantity, unitPrice )

Account(accountNumber, customerId, dateOpened, creditCard, mailingStreet, mailingCity, mailingState, mailingZip)

2.1 (2 Points) List all possible foreign keys. For each foreign key list both the referencing and referenced relations.

2.2 (2 Points) Devise a reasonable database instance by filling the tables with data of your choice. Make sure to have at least 3 tuples in each table. Make sure that all tables exhibits entity integrity and referential integrity constraints. Make sure to use good table layout in your answer.

2.3 (3 Points) For each of the following queries, write a relational algebra expression to answer the query:

a) Find the names of all customers who live in Hopkins, on St. Ann Street.

b) Find the names and cities of residence of all customers who have accounts.

c) Find the names, street address, and cities of residence for all customers who have ordered product number 320894.

2.4 (2 point) For each of the following relational algebra expressions, explain the output of the expression in words:

_{credit_card}(_{mailingCity=St. Paul}( account)

_{accountNumber}(_{customerCity=chicago}( customer account)