NW5 Manchester - Doris Siu - SQL - Week 2

.gitignore

@@ -0,0 +1 @@
+node_modules

2-exercises/task.md

@@ -7,7 +7,83 @@ 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
+1. select name, address from customers where country = 'United States';
+2. select * from customers order by name;
+3. select * from products where product_name ilike 'socks%' or product_name ilike '%socks' or product_name ilike '%socks%';
+4. select pa.prod_id, p.product_name, pa.unit_price, pa.supp_id
+from product_availability pa
+join products p
+on (pa.prod_id = p.id)
+where pa.unit_price >100;
+5. select * from product_availability order by unit_price desc limit 5;
+6. 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 (s.id=pa.supp_id);
+7. select p.product_name, s.supplier_name from products p join product_availability pa on (p.id=pa.prod_id) join suppliers s on (s.id=pa.supp_id) where s.country = 'United Kingdom';
+8. select oi.order_id, o.order_reference, o.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);
+9. select o.order_date, o.order_reference, oi.order_id, oi.quantity, p.product_name as order_items
+from customers c
+join orders o
+on (c.id = o.customer_id)
+join order_items oi
+on (o.id = oi.order_id)
+join product_availability pa
+on (oi.product_id = pa.prod_id)
+join products p
+on (pa.prod_id = p.id)
+where c.name = 'Hope Crosby';
+10. select p.product_name, pa.unit_price, oi.quantity
+from customers c
+join orders o
+on (c.id = o.customer_id)
+join order_items oi
+on (o.id = oi.order_id)
+join product_availability pa
+on (oi.product_id = pa.prod_id)
+join products p
+on (pa.prod_id = p.id)
+where o.order_reference = 'ORD006';
+11. select c.name, o.order_date, o.order_reference, p.product_name, s.supplier_name, oi.quantity
+from customers c
+join orders o
+on (c.id = o.customer_id)
+join order_items oi
+on (o.id = oi.order_id)
+join product_availability pa
+on (oi.product_id = pa.prod_id)
+join products p
+on (pa.prod_id = p.id)
+join suppliers s on (s.id = pa.supp_id);
+12. select c.name
+from customers c
+join orders o
+on (c.id = o.customer_id)
+join order_items oi
+on (o.id = oi.order_id)
+join product_availability pa
+on (oi.product_id = pa.prod_id)
+join products p
+on (pa.prod_id = p.id)
+join suppliers s on (s.id = pa.supp_id) where s.country = 'China';
+13.select c.name, o.order_reference, o.order_date, p.product_name, (oi.quantity *pa.unit_price) as total
+from customers c
+join orders o
+on (c.id = o.customer_id)
+join order_items oi
+on (o.id = oi.order_id)
+join product_availability pa
+on (oi.product_id = pa.prod_id)
+join products p
+on (pa.prod_id = p.id)
+join suppliers s on (s.id = pa.supp_id)order by total desc;
+
+
+
 
 
 ```
@@ -41,10 +117,9 @@ Once you understand the database that you are going to work with, solve the foll
 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`
 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).
+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`.
 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.
-
+13. List all orders giving customer name, order reference, order date and order total amount (quantity \* unit price) in descending order of total.