HadiyahL/week3

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

@@ -7,8 +7,76 @@ Below you will find a set of tasks for you to complete to set up a databases of
 To submit this homework write the correct commands for each question here:
 
 ```sql
+1. createdb cyf_classes;
 
+2. CREATE TABLE mentors (
+   id             SERIAL PRIMARY KEY,
+   name           VARCHAR(30) NOT NULL,
+   years          INT,
+   address        VARCHAR(120),
+   prog_language  VARCHAR(20) NOT NULL
+   );
 
+3. INSERT INTO mentors (name, years, address, prog_language) VALUES('Shukri Ali', 5, 'West Midlands, Glassgow', 'Java');
+   INSERT INTO mentors (name, years, address, prog_language) VALUES('Nadir Khan', 3, 'East Midlands, Glassgow', 'JavaScript');
+   INSERT INTO mentors (name, years, address, prog_language) VALUES('Emile Paffard-Wray', 10, 'South Midlands, Glasgow', 'React');
+   INSERT INTO mentors (name, years, address, prog_language) VALUES('Wahab Rehman', 8, 'North Midlands, Glasgow', 'React');
+   INSERT INTO mentors (name, years, address, prog_language) VALUES('Mark Farmiloe', 15, 'Great Midlands, Glassgow', 'SQL');
+
+4. CREATE TABLE students (
+   id       SERIAL PRIMARY KEY,
+   name     VARCHAR(30) NOT NULL,
+   address  VARCHAR(120),
+   graduate BOOLEAN NOT NULL
+   );
+
+5. INSERT INTO students (name, address, graduate) VALUES('Hadiyah Lawal', 'West Midlands, Birmingham', false);
+   INSERT INTO students (name, address, graduate) VALUES('Sonjide Hussain', 'Clarkson, London', true);
+   INSERT INTO students (name, address, graduate) VALUES('Omolola Bello', 'Smethwick, Birmingham', false);
+   INSERT INTO students (name, address, graduate) VALUES('Cynthia Eburu', 'Chaltam House, London', true);
+   INSERT INTO students (name, address, graduate) VALUES('Min ko', 'Cape Town, South-Africa', true);
+   INSERT INTO students (name, address, graduate) VALUES('Zubeda Khanum', 'Green Lane, Birmingham', false);
+   INSERT INTO students (name, address, graduate) VALUES('Adebola Alaba-Ige', 'Coventry, Birmingham', false);
+   INSERT INTO students (name, address, graduate) VALUES('Gintaras Stankus', 'Solihull Quarters, Birmingham', false);
+   INSERT INTO students (name, address, graduate) VALUES('Ellie Tahmasebi', 'Alexandra Avenue, London', true);
+   INSERT INTO students (name, address, graduate) VALUES('Denis Peptanariu', 'Egbaston Avenue, Birmingham', false);
+
+6. SELECT * FROM mentors;
+   SELECT * FROM students;
+
+7. CREATE TABLE classes (
+   id             SERIAL PRIMARY KEY,
+   leading_mentor VARCHAR(30) NOT NULL,
+   module         VARCHAR(30) NOT NULL,
+   location       VARCHAR(30) NOT NULL,
+   date           DATE NOT NULL
+   );
+
+8. INSERT INTO classes (leading_mentor, module, location, date) VALUES('Cemil Okay', 'HTML/CSS', 'Aston University, Birmingham',    '2020-04-25');
+   INSERT INTO classes (leading_mentor, module, location, date) VALUES('Wahab Rehman', 'JavaScript', 'Zoom Online class', '2020-05-28');
+   INSERT INTO classes (leading_mentor, module, location, date) VALUES('Andy Delaney', 'React', 'Zoom Online class', '2020-06-30');
+   INSERT INTO classes (leading_mentor, module, location, date) VALUES('Nick Holdsworth', 'Node.js', 'Zoom Online class', '2020-07-31');
+   INSERT INTO classes (leading_mentor, module, location, date) VALUES('Mark Farmiloe', 'SQL', 'Zoom Online class', '2020-09-02');
+
+9. CREATE TABLE javascript (
+   id             SERIAL PRIMARY KEY,
+   student_id     INT REFERENCES students(id),
+   class_id       INT REFERENCES classes(id)
+   );
+
+   INSERT INTO javascript (student_id, class_id) VALUES (3, 2);
+   INSERT INTO javascript (student_id, class_id) VALUES (4, 2);
+   INSERT INTO javascript (student_id, class_id) VALUES (6, 2);
+   INSERT INTO javascript (student_id, class_id) VALUES (7, 2);
+   INSERT INTO javascript (student_id, class_id) VALUES (9, 2);
+   INSERT INTO javascript (student_id, class_id) VALUES (10, 2);
+
+
+10. SELECT * FROM mentors WHERE years > 5;
+    SELECT * FROM mentors WHERE prog_language = 'JavaScript';
+    SELECT * FROM students WHERE graduate = true;
+    SELECT * FROM classes WHERE date < '2020/06/01';
+    SELECT stu.name, stu.id, cla.leading_mentor FROM students stu,classes cla, javascript jav  WHERE stu.id = student_id AND cla.id =class_id;
 ```
 
 When you have finished all of the questions - open a pull request with your answers to the `Databases-Homework` repository.

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

@@ -6,11 +6,31 @@ 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 databases of students and mentors.
 
-To submit this homework write the correct commands for each question here:
+To submit this homework write the correct commands for each question here: 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 from China.
 
 ```sql
-
-
+1.  SELECT name, address FROM customers WHERE country = 'United States';
+2.  SELECT * FROM customers ORDER BY name;
+3.  SELECT * FROM products WHERE unit_price > 100;
+4.  SELECT * FROM products WHERE product_name LIKE '%socks%';
+5.  SELECT * FROM products ORDER BY unit_price DESC LIMIT 5;
+6.  SELECT p.product_name, s.supplier_name FROM products p, suppliers s WHERE s.id = p.supplier_id;
+7.  SELECT p.product_name, s.supplier_name, s.country FROM products p, suppliers s WHERE s.id = p.supplier_id
+    AND s.country = 'United Kingdom';
+8.  SELECT * FROM orders WHERE customer_id = 1;
+9.  SELECT * FROM orders o, customers c WHERE c.id = o.customer_id AND c.name = 'Hope Crosby';
+10. SELECT p.product_name,p.unit_price,oi.quantity
+    FROM products p, orders o, order_items oi
+    WHERE p.id=oi.product_id
+    AND o.id=oi.order_id
+    AND 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, products p, suppliers s, orders o, order_items oi
+    WHERE c.id=o.customer_id AND o.id=oi.order_id AND oi.product_id=p.id AND s.id=p.supplier_id;
+12. SELECT c.name, p.product_name, s.country
+    FROM customers c, orders o, products p, suppliers s,order_items oi
+    WHERE c.id=o.customer_id AND o.id=oi.order_id AND oi.product_id=p.id AND s.id=p.supplier_id
+    AND s.country='China';
 ```
 
 When you have finished all of the questions - open a pull request with your answers to the `Databases-Homework` repository.

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

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