SQL serverPlease 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 DesignDesign 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 TablesIntegrate 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 - HireDateConsider creating relationships, such as linking ShipperID in the Orders table to establish which shipper handles each order.#### 3. Indexing StrategyModify 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 EmployeeIDExplain the reasoning for indexing columns to improve query performance and data retrieval efficiency.

Solution: 1) Table Shippers -->ShipperID - primary keyShipperNameShipperAddressShipperPhone…

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

Systems Architecture

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ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter3: Data Representation

Section: Chapter Questions

Problem 3RP

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SQL server

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.

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