Question
Reference for Question 1 Sales Database: Customer(custId, lastName, firstName, address, phone, creditLimit) Order(orderNumber, date, total, custId) LineItem( orderNumber, itemNumber , qtyOrdered) Item(itemNumber, itemName, price) For
Reference for Question 1
Sales Database:
Customer(custId, lastName, firstName, address, phone, creditLimit)
Order(orderNumber, date, total, custId)
LineItem(orderNumber, itemNumber, qtyOrdered)
Item(itemNumber, itemName, price)
For the Sales Database in the reference, write the relational algebra expression for the query
Find the lastName of the customer for orderNumber 12345.
Reference for Question 2
Sales Database:
Customer(custId, lastName, firstName, address, phone, creditLimit)
Order(orderNumber, date, total, custId)
LineItem(orderNumber, itemNumber, qtyOrdered)
Item(itemNumber, itemName, price)
For the Sales Database in the reference, write the relational algebra expression for the query "Find the names and quantities of all items on order 12345."
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