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Data Definition and Data Manipulation Language
The case study retail store has provided a list of reports and data manipulation tasks that are needed in the processing of orders for their customers. Answer the following:
What structured query language (SQL) statement scripts are needed to create the database schema for the relational database system and manipulate the data in the solution that you are proposing to the company? How does each of these scripts specifically support the goals and objectives of the company? to help you with this assignment.
As indicated in Unit 1, it is assumed that Microsoft SQL Server Express Edition (with management tools) was chosen as the database platform. It can be downloaded for free at .
The project deliverables are as follows:
Data Manipulation Tasks Insert 20 records into each table for testing purposes. Delete an entire order by using the unique identifier for that order. Update the price of a product by using the unique identifier for that product. Add a minimum of 3 of your own data manipulation language (DML) scripts based on the needs and specifications of your retail store. Report List Total revenue (sales) per month, grouped by customer Total revenue (sales) per month, grouped by product Total count of products, grouped by category Add minimum of 3 of your own report scripts based on the needs and specifications of your retail store (one must be a CROSSTAB) SQL (45 pages) Include the database definition language (DDL) scripts to CREATE to database schema as described in the entityrelationship (ER) diagram (Unit 2).
-- Insert 20 records into each table (example for Customers)INSERTINTO Customers (Name, Address, ContactInformation)
VALUES ('John Doe', '123 Main St', '[email protected]'),
-- ... other records ...-- Delete an entire orderDELETEFROM Orders WHERE OrderID =123;
-- Update product price
UPDATE Products SET Price =19.99WHERE ProductID =456;
Reports (SELECT, GROUP BY, CROSSTAB)
SQL
-- Total revenue per month, grouped by customerSELECT c.CustomerID, MONTH(o.OrderDate) ASMonth, SUM(od.Quantity * od.Price) AS TotalRevenue
FROM Orders o
INNERJOIN Customers c ON o.CustomerID = c.CustomerID
INNERJOIN OrderDetails od ON o.OrderID = od.OrderID
GROUPBY c.CustomerID, MONTH(o.OrderDate);
-- Total revenue per month, grouped by productSELECT p.ProductID, MONTH(o.OrderDate) ASMonth, SUM(od.Quantity * od.Price) AS TotalRevenue
FROM Orders o
INNERJOIN OrderDetails od ON o.OrderID = od.OrderID
INNERJOIN Products p ON od.ProductID = p.ProductID
GROUP
1. stackoverflow.com
BY p.ProductID, MONTH(o.OrderDate);
-- Total count of products, grouped by categorySELECT c.CategoryName, COUNT(p.ProductID) AS ProductCount
FROM Categories c
INNERJOIN Products p ON c.CategoryID = p.CategoryID
GROUPBY c.CategoryName;
Supporting Goals and Objectives
Database schema: Defines the data structure to accurately represent the retail store's operations.
Data manipulation: Allows for efficient data management, updates, and corrections.
Reports: Provides valuable insights into sales performance, customer behavior, and product popularity.
By creating these SQL scripts, the retail store can effectively manage its data, generate meaningful reports, and make data-driven decisions.
Sample Answer
Task Breakdown
The task involves creating a database schema for a retail store, populating it with data, manipulating data through SQL queries, and generating reports based on the data. The goal is to provide insights into the store's performance.
Proposed Solution
We will use Microsoft SQL Server Express Edition to create a relational database. The database will contain tables for customers, products, orders, order details, and potentially other relevant entities based on the specific retail store's needs.