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1. Design a database diagram for a product orders database with four tables. Indicate the relationships between tables and identify the primary key and foreign keys in each table. Explain your design decisions. Customers CustomerID CustomerName CustomerAddress CustomerPhone *** Shippers ShipperID Shipper Name ShipperAddress ShipperPhone Orders OrdersID CustomerlD Order Date *** ShipAddress ShipDate 2. Add the two tables below into the design for exercise 1. Create additional tables and columns, if necessary. Explain your design decisions. Employees EmployeelD FirstName LastName SSN HireDate OrderLineltems *** OrderID OrderSequence ProductID Quantity UnitPrice Products ProductID ProductName QtyPerUnit UnitPrice InStock OnOrder

1. Design a database diagram for a product orders database with four tables. Indicate the relationships between tables and identify the primary key and foreign keys in each table. Explain your design decisions. Customers CustomerID CustomerName CustomerAddress CustomerPhone *** Shippers ShipperID Shipper Name ShipperAddress ShipperPhone Orders OrdersID CustomerlD Order Date *** ShipAddress ShipDate 2. Add the two tables below into the design for exercise 1. Create additional tables and columns, if necessary. Explain your design decisions. Employees EmployeelD FirstName LastName SSN HireDate OrderLineltems *** OrderID OrderSequence ProductID Quantity UnitPrice Products ProductID ProductName QtyPerUnit UnitPrice InStock OnOrder

Database System Concepts
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
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Please help answer questions 1-3.   Please type out answers because sometimes it's hard for me to read people's handwritting on pictures.  Thank you.

### Database Design Exercise #### 1. Initial Database Design Design a database diagram for a product orders database consisting of four tables with defined relationships and keys: - **Customers Table** - **CustomerID**: Primary Key - CustomerName - CustomerAddress - CustomerPhone - **Orders Table** - **OrderID**: Primary Key - **CustomerID**: Foreign Key (References Customers) - OrderDate - ShipAddress - ShipDate - **OrderLineItems Table** - **OrderID**: Foreign Key (References Orders) - **OrderSequence**: Composite Primary Key with OrderID - **ProductID**: Foreign Key (References Products) - Quantity - UnitPrice - **Products Table** - **ProductID**: Primary Key - ProductName - QtyPerUnit - UnitPrice - InStock - OnOrder #### 2. Extended Design with Additional Tables Integrate the following two tables into the existing design. Additional tables or columns may be created as necessary: - **Shippers Table** - **ShipperID**: Primary Key - ShipperName - ShipperAddress - ShipperPhone - **Employees Table** - **EmployeeID**: Primary Key - FirstName - LastName - SSN - HireDate Consider creating relationships, such as linking ShipperID in the Orders table to establish which shipper handles each order. #### 3. Indexing Strategy Modify the design to identify which columns should be indexed for optimization: - **Customers Table**: Index CustomerID - **Orders Table**: Index OrderID, CustomerID, ShipDate - **OrderLineItems Table**: Index OrderID, ProductID for faster retrieval of order details - **Products Table**: Index ProductID, InStock - **Shippers Table**: Index ShipperID - **Employees Table**: Index EmployeeID Explain the reasoning for indexing columns to improve query performance and data retrieval efficiency.
Transcribed Image Text:### Database Design Exercise #### 1. Initial Database Design Design a database diagram for a product orders database consisting of four tables with defined relationships and keys: - **Customers Table** - **CustomerID**: Primary Key - CustomerName - CustomerAddress - CustomerPhone - **Orders Table** - **OrderID**: Primary Key - **CustomerID**: Foreign Key (References Customers) - OrderDate - ShipAddress - ShipDate - **OrderLineItems Table** - **OrderID**: Foreign Key (References Orders) - **OrderSequence**: Composite Primary Key with OrderID - **ProductID**: Foreign Key (References Products) - Quantity - UnitPrice - **Products Table** - **ProductID**: Primary Key - ProductName - QtyPerUnit - UnitPrice - InStock - OnOrder #### 2. Extended Design with Additional Tables Integrate the following two tables into the existing design. Additional tables or columns may be created as necessary: - **Shippers Table** - **ShipperID**: Primary Key - ShipperName - ShipperAddress - ShipperPhone - **Employees Table** - **EmployeeID**: Primary Key - FirstName - LastName - SSN - HireDate Consider creating relationships, such as linking ShipperID in the Orders table to establish which shipper handles each order. #### 3. Indexing Strategy Modify the design to identify which columns should be indexed for optimization: - **Customers Table**: Index CustomerID - **Orders Table**: Index OrderID, CustomerID, ShipDate - **OrderLineItems Table**: Index OrderID, ProductID for faster retrieval of order details - **Products Table**: Index ProductID, InStock - **Shippers Table**: Index ShipperID - **Employees Table**: Index EmployeeID Explain the reasoning for indexing columns to improve query performance and data retrieval efficiency.
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