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
Chapter1: Overview Of Database Concepts
Section: Chapter Questions
Problem 5HOA: Access path A database table is composed of records and fields hold data. Data is stored in records....
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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.
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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