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Create a View for Customer Order Summary
Create a View for Customer Order Summary
Orders Table:
Query Explanation:
-
CREATE VIEW CustomerOrderSummary AS: A new view is being created to summarize customer orders.
-
SELECT o.CustomerID: Selects the
CustomerIDfrom theOrderstable. -
COUNT(o.OrderID) AS TotalOrders: Counts the total number of orders for each customer.
-
SUM(od.Quantity * od.UnitPrice - od.Discount) AS TotalSpent: Calculates the total amount spent by each customer by multiplying quantity and unit price, and subtracting the discount from each order in the
OrderDetailstable. -
FROM Orders o JOIN OrderDetails od: Joins the
Orderstable with theOrderDetailstable to get all order-related details. -
ON o.OrderID = od.OrderID: The join condition is based on matching
OrderIDin both tables. -
GROUP BY o.CustomerID: Groups the result by
CustomerID, so each row shows data for one customer.
Result: The view will provide a summary of how many orders each customer placed and the total amount they spent.
SQL Query:
-- Create a view to summarize customer orders using OrderDetails table for the total value
CREATE VIEW CustomerOrderSummary AS
SELECT
o.CustomerID, -- Customer ID
COUNT(o.OrderID) AS TotalOrders, -- Total number of orders by customer
SUM(od.Quantity * od.UnitPrice - od.Discount) AS TotalSpent -- Total spent calculated from OrderDetails
FROM
Orders o -- From the Orders table
JOIN
OrderDetails od -- Join with OrderDetails to get details for each order
ON o.OrderID = od.OrderID -- Matching OrderID in both tables
GROUP BY
o.CustomerID; -- Grouping by CustomerID to get summary per customer
-- View the data from the CustomerOrderSummary view
SELECT * FROM CustomerOrderSummary;
Output:
