Update inactive customer query

src/data/courses/sql-mastery/chapters/multi-table-queries/lessons/high-value-orders.md

@@ -39,9 +39,9 @@ setup: |
   ```
 ---
 
-Given the following three tables you are required to write a query to find the orders worth more than or equal to $500.
+The bookstore wants to identify their most valuable orders to better understand their high-spending customers. The marketing team plans to create a VIP program for customers who make large purchases, and they've defined a high-value order as any purchase of $500 or more. They need a report of all such orders to begin their analysis.
 
-> `customer` table has the list of customers.
+Given the following data in table `customer`
 
 | id  | name          | email                     |
 | --- | ------------- | ------------------------- |
@@ -52,25 +52,25 @@ Given the following three tables you are required to write a query to find the o
 | 5   | Charlie Davis | charlie.davis@example.com |
 | 6   | David Lee     | david.lee@example.com     |
 
-> `sale` table has the list of sales.
+And the following data in table `sale`
 
 | id  | customer_id | order_date | total_amount |
 | --- | ----------- | ---------- | ------------ |
 | 1   | 1           | 2024-12-02 | 100.00       |
 | 2   | 1           | 2024-11-15 | 150.00       |
-| 3   | 1           | 2024-10-20 | 200.00       |
+| 3   | 1           | 2024-10-20 | 550.00       |
 | 4   | 4           | 2024-12-26 | 250.00       |
 | 5   | 5           | 2024-11-12 | 300.00       |
 | 6   | 2           | 2024-11-23 | 300.00       |
-| 7   | 2           | 2024-11-11 | 300.00       |
+| 7   | 2           | 2024-11-11 | 600.00       |
 
-Your output should contain the orders with amount greater than or equal to `$500` and the following columns for each order:
+Write a query to identify all orders worth $500 or more. The marketing team wants to see:
 
-- `customer_name`
-- `order_amount`
-- `order_date`
+- The customer's name
+- The order amount
+- When the order was placed (formatted as "Month DD, YYYY")
 
-Results should be sorted by `order_amount` in descending order.
+Results should be ordered by amount from highest to lowest to easily identify the most valuable orders.
 
 ## Expected Output
 
@@ -83,11 +83,44 @@ Results should be sorted by `order_amount` in descending order.
 
 ```sql
 SELECT
-    c.name,
-    s.total_amount,
+    c.name AS customer_name,
+    s.total_amount AS order_amount,
     TO_CHAR(s.order_date, 'Month DD, YYYY') AS order_date
 FROM customer c
-JOIN sale s ON c.id = s.customer_id
+JOIN sale s
+    ON c.id = s.customer_id
 WHERE s.total_amount >= 500
 ORDER BY s.total_amount DESC;
 ```
+
+### Explanation
+
+Let's break down how this query works:
+
+We join the `customer` and `sale` tables to get customer information with their orders:
+
+```sql
+FROM customer c
+JOIN sale s
+    ON c.id = s.customer_id
+```
+
+We filter for high-value orders using the WHERE clause:
+
+```sql
+WHERE s.total_amount >= 500
+```
+
+We format the date to be more readable using `TO_CHAR`:
+
+```sql
+TO_CHAR(s.order_date, 'Month DD, YYYY') AS order_date
+```
+
+Finally, we order the results by total amount in descending order to see the highest value orders first:
+
+```sql
+ORDER BY s.total_amount DESC
+```
+
+This query helps the marketing team identify their highest-value orders and the customers who placed them, providing valuable information for their VIP program initiative.