uestion Consider the following database schema. CUSTOMER (CID, NAME, STREET, CITY, STATE, AGE) SALE (PID CID, DATE, COST) PART (PID, PNAME, COLOR) The meaning of these relations is straightforward; for example, SALE has one tuple for every part sold to a customer. Primary key attributes are underlined. For instance, PID and CID together form the primary key of relation SALE. SALE PID is a foreign key that refers to PART.PID, while SALE.CID is a foreign key that refers to CUSTOMER.CID. D Question 2 Consider the database schema of Question 1. Express each of the following constraints in SQL. 1. Red parts cannot be sold more than 1000 times. 2. No customer is allowed to buy more than 100 (not necessarily distinct) green parts.

uestion Consider the following database schema. CUSTOMER (CID, NAME, STREET, CITY, STATE, AGE) SALE (PID CID, DATE, COST) PART (PID, PNAME, COLOR) The meaning of these relations is straightforward; for example, SALE has one tuple for every part sold to a customer. Primary key attributes are underlined. For instance, PID and CID together form the primary key of relation SALE. SALE PID is a foreign key that refers to PART.PID, while SALE.CID is a foreign key that refers to CUSTOMER.CID. D Question 2 Consider the database schema of Question 1. Express each of the following constraints in SQL. 1. Red parts cannot be sold more than 1000 times. 2. No customer is allowed to buy more than 100 (not necessarily distinct) green parts.

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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