Altom week 3

week-1/mandatory/2-classes-db/task.md

@@ -7,6 +7,50 @@ Below you will find a set of tasks for you to complete to consolidate and extend
 To submit this homework write the correct commands for each question here:
 
 ```sql
+1-
+a-SELECT rate from rooms where rate >100;
+b-SELECT * from rooms where rate > 100.00;
+
+2-
+a-SELECT *, checkout_date - checkin_date as nights  from reservations where checkin_date BETWEEN '2020-09-01' and '2020-09-30' and checkout_date- checkin_date >3;
+b-select *, checkout_date - checkin_date as night  from reservations where (extract(month from checkin_date)) = (extract(month from current_date)) and  checkout_date - checkin_date > 3;
+3-
+SELECT * from customers where city like 'M%';
+
+4- insert into room_types (room_type, def_rate) 
+values ('PENTHOUSE', '185');
+
+5-
+a-INSERT INTO rooms (room_no, rate, room_type) VALUES (501, 185, 'PENTHOUSE');
+b-INSERT into rooms (room_no, rate, room_type) VALUES (502, 185, 'PENTHOUSE');
+
+6-INSERT into rooms (room_no, room_type, rate) VALUES(503, 'PREMIER PLUS', 143);
+
+7-
+a-SELECT count(room_no) from reservations where checkin_date BETWEEN '2020-08-01' and '2020-08-31';
+b-select count(room_no) from reservations where checkin_date >='2020-08-01' and checkout_date <= '2020-08-31';
+
+8-
+a-SELECT  sum(checkout_date - checkin_date) as nights from reservations where room_no BETWEEN 201 and 299 ;
+b-SELECT  sum(checkout_date - checkin_date) from reservations where room_no > 201 and room_no < 299 ;
+
+9-
+first part of the question:
+SELECT * from invoices where total > 300;
+second part of the question:
+SELECT  sum(total) from invoices WHERE total > 300;
+third part of the question:
+SELECT  avg(total) from invoices WHERE total > 300;
+
+10-
+first floor = 54:
+SELECT sum(checkout_date -checkin_date) as nights from reservations where room_no BETWEEN 101 and 199;
+ second floor = 63:
+ SELECT sum(checkout_date -checkin_date) as nights from reservations where room_no BETWEEN 201 and 299;
+ third floor = 46:
+ SELECT sum(checkout_date -checkin_date) as nights from reservations where room_no BETWEEN 301 and 399;
+forth floor = 40:
+SELECT sum(checkout_date -checkin_date) as nights from reservations where room_no BETWEEN 401 and 499;
 
 
 ```
@@ -32,5 +76,6 @@ Using what you can learn about aggregate functions in the w3schools SQL classes
 
 7.  The hotel manager wishes to know how many rooms were occupied any time during the previous month - find that information.
 8.  Get the total number of nights that customers stayed in rooms on the second floor (rooms 201 - 299).
+
 9.  How many invoices are for more than £300.00 and what is their grand total and average amount?
 10.  Bonus Question: list the number of nights stay for each floor of the hotel (floor no is the hundreds part of room number, e.g. room **3**12 is on floor **3**)

week-2/mandatory/3-api/cyf-ecommerce-api/.gitignore

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