PR for lab submission

README.md

@@ -1,4 +1,9 @@
 
+<h1 align="center">Marco Villasmil</h1
+
+<hr style="border:5px solid gray">
+
+
 ![logo_ironhack_blue 7](https://user-images.githubusercontent.com/23629340/40541063-a07a0a8a-601a-11e8-91b5-2f13e4e6b441.png)
 
 # LAB | Java SQL
@@ -248,4 +253,4 @@ FULL OUTER JOIN:
   git push origin <branch_name>
   ```
 
-</details>
+</details>

airline.sql

@@ -0,0 +1,123 @@
+CREATE SCHEMA airline_data;
+
+USE airline_data;
+
+-- created a new schema and chose the schema to insert the tables to
+
+
+
+-- the data needs to be devided into several tables
+
+-- creating an aircrafts table
+CREATE TABLE aircraft(
+    aircraft_id INT AUTO_INCREMENT PRIMARY KEY,
+    aircraft_model VARCHAR(50),
+    total_aircraft_seats INT
+);
+
+
+-- creating a flights table
+CREATE TABLE flights (
+    flight_id INT AUTO_INCREMENT PRIMARY KEY,
+    flight_number VARCHAR(10),
+    flight_mileage INT
+);
+
+
+-- creating customers table
+CREATE TABLE customers (
+    cust_id INT AUTO_INCREMENT PRIMARY KEY,
+    cust_name VARCHAR(255),
+    cust_status VARCHAR(10),
+    total_cust_mileage INT,
+    cust_flight_number VARCHAR(10)
+);
+
+
+---- inserting data into their respective tables
+
+
+INSERT INTO aircraft (aircraft_model, total_aircraft_seats)
+VALUES
+    ('Boeing 747', 400),
+    ('Airbus A330', 236),
+    ('Boeing 777', 264);
+
+INSERT INTO flights (flight_number, flight_mileage)
+VALUES
+    ('DL143', 135),
+    ('DL122', 4370),
+    ('DL53', 2078),
+    ('DL222', 1765),
+    ('DL37', 531);
+
+INSERT INTO customers (cust_name, cust_status, total_cust_mileage, cust_flight_number)
+VALUES
+    ('Agustine Riviera', 'Silver', 115235, 'DL143'),
+    ('Alaina Sepulvida', 'None', 6008, 'DL122'),
+    ('Tom Jones', 'Gold', 205767, 'DL122'),
+    ('Sam Rio', 'None', 2653, 'DL143'),
+    ('Jessica James', 'Silver', 127656, 'DL143'),
+    ('Ana Janco', 'Silver', 136773, 'DL222'),
+    ('Jennifer Cortez', 'Gold', 300582, 'DL222'),
+    ('Christian Janco', 'Silver', 14642, 'DL222');
+
+
+-- exercises
+
+-- total number of flights
+SELECT count(*) as total_flights
+FROM flights;
+
+
+-- average flight distance
+SELECT ROUND(AVG(flight_mileage)) as avg_flight_distance
+FROM flights;
+
+
+-- average amount of seats
+SELECT ROUND(AVG(total_aircraft_seats)) AS avg_amount_seats
+FROM aircraft;
+
+
+
+-- average amount of flight miles per cst status group
+SELECT
+    AVG(total_cust_mileage) AS avg_mileage,
+    cust_status
+FROM customers
+GROUP BY cust_status
+ORDER BY avg_mileage DESC;
+
+-- max number of flight miles per cst status group
+SELECT
+    MAX(total_cust_mileage) AS max_mileage,
+    cust_status
+FROM customers
+GROUP BY cust_status
+ORDER BY max_mileage DESC;
+
+
+-- total number of "Boeing" aircrafts
+SELECT COUNT(aircraft_model) AS total_Boeing_aircrafts
+FROM aircraft
+WHERE aircraft_model like '%Boeing%';
+
+
+
+-- list of flights with a distance between 300 and 2000 miles
+SELECT flight_number, flight_mileage
+FROM flights
+WHERE flight_mileage BETWEEN 300 AND 2000;
+
+
+--------- dont understand the wording of the problem
+---- the average distance per cst group??
+SELECT
+    c.cust_status,
+    AVG(f.flight_mileage) AS average_flight_mileage
+FROM customers c
+JOIN flights f ON c.cust_flight_number = f.flight_number
+GROUP BY c.cust_status;
+
+

blog.sql

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+CREATE SCHEMA blog_info;
+
+USE blog_info;
+
+-- created a new schema and chose the schema to insert the tables to
+
+CREATE TABLE blog_titles (
+    blog_id INT AUTO_INCREMENT PRIMARY KEY,
+    author VARCHAR(50),
+    title VARCHAR(255),
+    word_count INT,
+    views INT
+);
+
+INSERT INTO blog_titles (author, title, word_count, views)
+VALUES
+    ('Maria Charlotte', 'Best Paint Colors', 814, 14),
+    ('Juan Perez', 'Small Space Decorating Tips', 1146, 221),
+    ('Maria Charlotte', 'Hot Accessories', 986, 105),
+    ('Maria Charlotte', 'Mixing Textures', 765, 22),
+    ('Juan Perez', 'Kitchen Refresh', 1242, 307),
+    ('Maria Charlotte', 'Homemade Art Hacks', 1002, 193),
+    ('Gemma Alcocer', 'Refinishing Wood Floors', 1571, 7542);
+
+
+-- displaying different information:
+
+-- showing everything
+SELECT *
+FROM blog_titles;
+
+-- number of views per author
+SELECT author, SUM(views) AS total_views
+FROM blog_titles
+GROUP BY author
+ORDER BY total_views DESC;
+
+
+-- author ranking based on word count per views. "return on investment" of words and views
+SELECT
+    author,
+    SUM(views) / SUM(word_count) AS return_per_views,
+    ROW_NUMBER() OVER (ORDER BY SUM(views) / SUM(word_count) DESC) AS author_ranking
+FROM blog_titles
+GROUP BY author
+ORDER BY return_per_views DESC;
+