From 22427640037a98f21f55da5dbb96059fc235a978 Mon Sep 17 00:00:00 2001
From: Mohammadreza <104798944+Mohammadrezanafar@users.noreply.github.com>
Date: Mon, 13 Feb 2023 17:56:18 +0000
Subject: [PATCH 1/2] 2 exercise compeleted

---
 2-exercises/package-lock.json |  6 ++++++
 2-exercises/task.md           | 40 +++++++++++++++++++++++++++++++----
 2 files changed, 42 insertions(+), 4 deletions(-)
 create mode 100644 2-exercises/package-lock.json

diff --git a/2-exercises/package-lock.json b/2-exercises/package-lock.json
new file mode 100644
index 00000000..4042d4b2
--- /dev/null
+++ b/2-exercises/package-lock.json
@@ -0,0 +1,6 @@
+{
+  "name": "2-exercises",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {}
+}
diff --git a/2-exercises/task.md b/2-exercises/task.md
index c48d2286..de6eac34 100644
--- a/2-exercises/task.md
+++ b/2-exercises/task.md
@@ -7,6 +7,7 @@ In this homework, you are going to work with an ecommerce database. In this data
 Below you will find a set of tasks for you to complete to set up a database for an e-commerce app.
 
 To submit this homework write the correct commands for each question here:
+
 ```sql
 
 
@@ -35,16 +36,47 @@ 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 asc; -->
+
 3. Retrieve all the products whose name contains the word `socks`
-4. Retrieve all the products which cost more than 100 showing product id, name, unit price and supplier id.
+<!-- 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 product_availability.prod_id,product_availability.unit_price,produ
+cts.product_name,suppliers.supplier_name from product_availability join products on(produ
+cts.id=product_availability.prod_id)join  suppliers on(suppliers.id=product_availability.
+supp_id)where product_availability.unit_price >100; -->
+
 5. Retrieve the 5 most expensive products
+
+<!-- select p.product_name, pa.unit_price from products p inner join product_availability pa on (p.id=pa.prod_id) order by pa.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 p.product_name, pa.unit_price, s.supplier_name FROM products p JOIN product_availability pa ON p.id = pa.prod_id JOIN suppliers s ON pa.supp_id = s.id; -->
+
 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 p.product_name, s.supplier_name FROM suppliers s JOIN product_availability pa ON s.id = pa.supp_id JOIN products p ON pa.prod_id = p.id WHERE s.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).
+
+<!-- SELECT o.id, o.order_reference, order_date,(oi.quantity * pa.unit_price) as Total_Cost FROM orders o JOIN order_items oi ON o.id = oi.order_id JOIN product_availability pa ON oi.product_id = pa.prod_id  WHERE customer_id = 1; -->
+
 9. Retrieve all orders, including order items, from customer named `Hope Crosby`
+<!-- SELECT * FROM customers
+INNER JOIN orders ON customers.id=orders.customer_id
+INNER JOIN order_items ON order_items.order_id=orders.id
+WHERE name ='Hope Crosby'; -->
+
 10. Retrieve all the products in the order `ORD006`. The result should only contain the columns `product_name`, `unit_price` and `quantity`.
+
+<!-- SELECT products.product_name, product_availability.unit_price, order_items.quantity FROM order_items INNER JOIN products ON order_items.product_id = products.id INNER JOIN product_availability ON order_items.product_id = product_availability.prod_id INNER JOIN orders ON order_items.order_id = orders.id WHERE orders.order_reference = 'ORD006'; -->
+
 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`.
-12. Retrieve the names of all customers who bought a product from a supplier based in China.
-13. List all orders giving customer name, order reference, order date and order total amount (quantity * unit price) in descending order of total.
+<!-- SELECT customers.name, orders.order_reference, orders.order_date, products.product_name, suppliers.supplier_name, order_items.quantity FROM order_items  INNER JOIN orders ON order_items.order_id = orders.id INNER JOIN products ON order_items.product_id = products.id INNER JOIN customers ON customers.id = orders.customer_id INNER JOIN suppliers ON order_items.supplier_id = suppliers.id; -->
 
+12. Retrieve the names of all customers who bought a product from a supplier based in China.
+<!-- SELECT customers.name FROM order_items INNER JOIN orders ON order_items.order_id = orders.id INNER JOIN customers ON orders.customer_id = customers.id INNER JOIN suppliers ON order_items.supplier_id = suppliers.id WHERE suppliers.country = 'China'; -->
+13. List all orders giving customer name, order reference, order date and order total amount (quantity \* unit price) in descending order of total.
+<!-- SELECT customers.name, orders.order_reference,orders.order_date, (order_items.quantity * product_availability.unit_price) AS total_amount FROM order_items INNER JOIN orders ON orders.id = order_items.order_id INNER JOIN product_availability ON product_availability.prod_id = order_items.product_id INNER JOIN customers ON customers.id = orders.customer_id ORDER BY total_amount DESC; -->

From 6fc033f0c4542c8f77452b7edddc59e9c3937b5c Mon Sep 17 00:00:00 2001
From: Mohammadreza <104798944+Mohammadrezanafar@users.noreply.github.com>
Date: Tue, 14 Feb 2023 23:20:45 +0000
Subject: [PATCH 2/2] Done

---
 2-exercises/task.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/2-exercises/task.md b/2-exercises/task.md
index de6eac34..b2e02307 100644
--- a/2-exercises/task.md
+++ b/2-exercises/task.md
@@ -45,7 +45,7 @@ Once you understand the database that you are going to work with, solve the foll
 4. Retrieve all the products which cost more than 100 showing
 product id, name, unit price and supplier id.
 <!-- select product_availability.prod_id,product_availability.unit_price,produ
-cts.product_name,suppliers.supplier_name from product_availability join products on(produ
+cts.product_name,suppliers.supplier_name from product_availability join products on(produ,
 cts.id=product_availability.prod_id)join  suppliers on(suppliers.id=product_availability.
 supp_id)where product_availability.unit_price >100; -->
 
@@ -74,7 +74,7 @@ WHERE name ='Hope Crosby'; -->
 <!-- SELECT products.product_name, product_availability.unit_price, order_items.quantity FROM order_items INNER JOIN products ON order_items.product_id = products.id INNER JOIN product_availability ON order_items.product_id = product_availability.prod_id INNER JOIN orders ON order_items.order_id = orders.id WHERE orders.order_reference = 'ORD006'; -->
 
 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`.
-<!-- SELECT customers.name, orders.order_reference, orders.order_date, products.product_name, suppliers.supplier_name, order_items.quantity FROM order_items  INNER JOIN orders ON order_items.order_id = orders.id INNER JOIN products ON order_items.product_id = products.id INNER JOIN customers ON customers.id = orders.customer_id INNER JOIN suppliers ON order_items.supplier_id = suppliers.id; -->
+<!-- SELECT customers.name, orders.order_reference, orders.order_date, products.product_name, suppliers.supplier_name, order_items.quantity FROM order_items  INNER JOIN orders ON order_items.order_id = orders.id INNER JOIN products ON order_items.product_id = products.id INNER JOIN customers ON customers.id = orders.customer_id INNER JOIN suppliers ON order_items.supplier_id = suppliers.id;-->
 
 12. Retrieve the names of all customers who bought a product from a supplier based in China.
 <!-- SELECT customers.name FROM order_items INNER JOIN orders ON order_items.order_id = orders.id INNER JOIN customers ON orders.customer_id = customers.id INNER JOIN suppliers ON order_items.supplier_id = suppliers.id WHERE suppliers.country = 'China'; -->