nw5/shimen-afshar/SQL-Week2

2-exercises/task.md

@@ -35,13 +35,31 @@ Open the file `cyf_ecommerce.sql` in VSCode and examine the SQL code. Take a pie
 Once you understand the database that you are going to work with, solve the following challenge by writing SQL queries using everything you learned about SQL:
 
 1. Retrieve all the customers' names and addresses who live in the United States
+select name, address from customers where country ='United States';
+
 2. Retrieve all the customers in ascending name sequence
+SELECT * FROM customers order by name DESC; 
+
 3. Retrieve all the products whose name contains the word `socks`
+ SELECT * FROM products WHERE product_name LIKE '%socks%'; 
+
 4. Retrieve all the products which cost more than 100 showing product id, name, unit price and supplier id.
+ SELECT p.id, p.product_name ,a.unit_price , a.supp_id FROM products p JOIN product_availability a on p.id= a.prod_id WHERE a.unit_price >100;
+
 5. Retrieve the 5 most expensive products
-6. Retrieve all the products with their corresponding suppliers. The result should only contain the columns `product_name`, `unit_price` and `supplier_name`
+SELECT* FROM product_availability order by unit_price desc limit 5; 
+
+6. Retrieve all the products with their corresponding suppliers. The result should only contain the 
+columns `product_name`, `unit_price` and `supplier_name`
+SELECT product_name, unit_price, supplier_name FROM products JOIN product_availability on (products.id = product_availability.prod_id) JOIN suppliers on (suppliers.id = product_availability.supp_id);
+s
+
 7. Retrieve all the products sold by suppliers based in the United Kingdom. The result should only contain the columns `product_name` and `supplier_name`.
-8. Retrieve all orders, including order items, from customer ID `1`. Include order id, reference, date and total cost (calculated as quantity * unit price).
+SELECT product_name,supplier_name FROM products JOIN suppliers on products.id = suppliers.id WHERE country = 'United Kingdom';
+
+8. Retrieve all orders, including order items, from customer ID `1`. Include order id, reference, date and total cost (calculated as quantity *
+ unit price).
+
 9. Retrieve all orders, including order items, from customer named `Hope Crosby`
 10. Retrieve all the products in the order `ORD006`. The result should only contain the columns `product_name`, `unit_price` and `quantity`.
 11. Retrieve all the products with their supplier for all orders of all customers. The result should only contain the columns `name` (from customer), `order_reference`, `order_date`, `product_name`, `supplier_name` and `quantity`.