Update Cahllenge 1 Steve's car showroom.md

Author: SQLicious

Cahllenge 1 Steve's car showroom.md

@@ -81,24 +81,68 @@ VALUES (1, 1, 1, '2021-01-01'),
 ## Ad-Hoc Questions and Solutions
 ### 1. What are the details of all cars purchased in the year 2022?
 
- ``` SQL code ```
+ ``` SQL
+SELECT *
+FROM cars
+WHERE car_id IN (
+    SELECT car_id
+    FROM sales2
+    WHERE YEAR(purchase_date) = 2022
+);
+```
 
 ### 2. What is the total number of cars sold by each salesperson?
- ``` SQL code ```
+ ``` SQL
+ SELECT s.name AS Salesperson,
+      COUNT(*) AS Total_Cars_Sold
+FROM salespersons s
+JOIN sales2 sa ON s.salesman_id = sa.salesman_id
+GROUP BY s.name;
+```
 
 ### 3.What is the total revenue generated by each salesperson?
 
-``` SQL code ```
+``` SQL
+SELECT s.name AS Salesperson,
+      SUM(c.cost_$) AS Total_Revenue_Generated
+FROM salespersons s
+JOIN sales2 sa ON s.salesman_id = sa.salesman_id
+JOIN cars c ON sa.car_id = c.car_id
+GROUP BY s.name;
+ ```
 
 ### 4. What are the details of the cars sold by each salesperson?
 
-``` SQL code ```
+``` SQL
+SELECT s.name AS Salesperson,
+       c.*
+FROM salespersons s
+JOIN sales2 sa ON s.salesman_id = sa.salesman_id
+JOIN cars c ON sa.car_id = c.car_id;
+ ```
 ### 5. What is the total revenue generated by each car type?
 
-``` SQL code ```
+``` SQL
+SELECT c.type,
+       SUM(c.cost_$) AS Total_Revenue_Generated
+FROM cars c
+JOIN sales2 sa ON c.car_id = sa.car_id
+GROUP BY c.type;
+ ```
 ### 6. What are the details of the cars sold in the year 2021 by salesperson 'Emily Wong'?
 
-``` SQL code ```
+``` SQL
+SELECT c.*
+FROM cars c
+JOIN sales2 sa ON c.car_id = sa.car_id
+JOIN salespersons s ON sa.salesman_id = s.salesman_id
+WHERE YEAR(sa.purchase_date) = 2021 AND s.name = 'Emily Wong';
+```
+# car_id, make, type, style, cost_$
+2, Toyota, Corolla, Hatchback, 25000
+4, Chevrolet, Camaro, Coupe, 36000```
+
+```
 ### 7. What is the total revenue generated by the sales of hatchback cars?
 
 ``` SQL code ```