Nawal/week3

week-2/mandatory/2-ecommerce-db/task.md

@@ -8,6 +8,70 @@ Below you will find a set of tasks for you to complete to set up a database for
 
 To submit this homework write the correct commands for each question here:
 ```sql
+1- select * from customers where country = 'United States';
+
+2- select * from customers order by name asc;
+
+3- select * from products where product_name like '%socks%';
+
+4- select p.id, p.product_name, pa.supp_id, pa.unit_price
+    from products p 
+    join product_availability pa on pa.prod_id = p.id 
+    where pa.unit_price >= 100;
+
+5- select p.id, p.product_name, pa.supp_id, pa.unit_price
+    from products p 
+    join product_availability pa on pa.prod_id = p.id 
+    order by pa.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 pa.supp_id = s.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 o.id, o.order_reference, o.order_date, 
+   item.quantity * pa.unit_price as "total cost" from orders o 
+   join customers c on  o.customer_id = c.id 
+   join order_items item on o.id = item.order_id 
+   join product_availability pa on  item.product_id = pa.prod_id 
+   where c.id  = 1;
+
+9- select o.customer_id, o.id, o.order_reference, o.order_date, 
+   item.product_id, item.supplier_id, item.quantity from orders o 
+   join order_items item on  o.id = item.order_id 
+   join customers c on o.customer_id = c.id 
+   where c.name = 'Hope Crosby';
+
+10- select p.product_name, oi.quantity, pa.unit_price from products p 
+    join product_availability pa on  pa.prod_id = p.id 
+    join order_items oi on oi.product_id = pa.prod_id 
+    join orders o on o.id = oi.order_id 
+    where o.order_reference = 'ORD006';
+
+11- select c.name, o.order_reference, o.order_date, p.product_name, 
+     s.supplier_name, oi.quantity from customers c 
+     join orders o on o.customer_id = c.id 
+     join order_items oi on  oi.order_id = o.id 
+     join products p on p.id = oi.product_id 
+     join suppliers s on s.id = oi.supplier_id;
+
+12- select c.name, s.country from customers c 
+     join orders o on  o.customer_id = c.id 
+     join order_items oi on  oi.order_id = o.id 
+     join suppliers s on s.id = oi.supplier_id 
+     where s.country = 'China';
+
+    13- select c.name, o.order_reference, o.order_date, sum(i.quantity * a.unit_price) as total from customers c 
+     join orders o on (o.customer_id = c.id) 
+     join order_items i on (i.order_id = o.id)
+     join product_availability a on (i.supplier_id  = a.supp_id and i.product_id = a.prod_id)
+     group by c.name, o.order_reference, o.order_date order by total desc;
 
 
 ```