lab 6

labsolution.sql

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+
+CREATE TABLE Authors (
+                         AuthorID INT PRIMARY KEY AUTO_INCREMENT,
+                         AuthorName VARCHAR(255) NOT NULL
+);
+
+
+CREATE TABLE Posts (
+                       PostID INT PRIMARY KEY AUTO_INCREMENT,
+                       AuthorID INT,
+                       Title VARCHAR(255) NOT NULL,
+                       WordCount INT,
+                       Views INT,
+                       FOREIGN KEY (AuthorID) REFERENCES Authors(AuthorID)
+);
+
+
+
+CREATE TABLE Customers (
+                           CustomerID INT PRIMARY KEY AUTO_INCREMENT,
+                           CustomerName VARCHAR(255) NOT NULL,
+                           CustomerStatus VARCHAR(50)
+);
+
+
+CREATE TABLE Flights (
+                         FlightNumber VARCHAR(10) PRIMARY KEY,
+                         Aircraft VARCHAR(50),
+                         TotalAircraftSeats INT,
+                         FlightMileage INT
+);
+
+
+CREATE TABLE CustomerFlights (
+                                 CustomerID INT,
+                                 FlightNumber VARCHAR(10),
+                                 TotalCustomerMileage INT,
+                                 FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID),
+                                 FOREIGN KEY (FlightNumber) REFERENCES Flights(FlightNumber),
+                                 PRIMARY KEY (CustomerID, FlightNumber)
+);
+
+
+SELECT COUNT(DISTINCT FlightNumber) AS TotalFlights
+FROM CustomerFlights;
+
+SELECT AVG(FlightMileage) AS AverageFlightDistance
+FROM Flights;
+
+SELECT AVG(TotalAircraftSeats) AS AverageSeats
+FROM Flights;
+
+SELECT c.CustomerStatus, AVG(cf.TotalCustomerMileage) AS AverageMiles
+FROM CustomerFlights cf
+         JOIN Customers c ON cf.CustomerID = c.CustomerID
+GROUP BY c.CustomerStatus;
+
+SELECT c.CustomerStatus, MAX(cf.TotalCustomerMileage) AS MaxMiles
+FROM CustomerFlights cf
+         JOIN Customers c ON cf.CustomerID = c.CustomerID
+GROUP BY c.CustomerStatus;
+
+SELECT COUNT(DISTINCT Aircraft) AS TotalBoeingAircraft
+FROM Flights
+WHERE Aircraft LIKE '%Boeing%';
+
+SELECT FlightNumber, FlightMileage
+FROM Flights
+WHERE FlightMileage BETWEEN 300 AND 2000;
+
+SELECT c.CustomerStatus, AVG(f.FlightMileage) AS AverageFlightDistance
+FROM CustomerFlights cf
+         JOIN Customers c ON cf.CustomerID = c.CustomerID
+         JOIN Flights f ON cf.FlightNumber = f.FlightNumber
+GROUP BY c.CustomerStatus;
+
+SELECT f.Aircraft, COUNT(*) AS BookingCount
+FROM CustomerFlights cf
+         JOIN Customers c ON cf.CustomerID = c.CustomerID
+         JOIN Flights f ON cf.FlightNumber = f.FlightNumber
+WHERE c.CustomerStatus = 'Gold'
+GROUP BY f.Aircraft
+ORDER BY BookingCount DESC
+    LIMIT 1;

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.ironhack</groupId>
+    <artifactId>lab6</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>22</maven.compiler.source>
+        <maven.compiler.target>22</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

src/main/java/com/ironhack/Main.java

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+package com.ironhack;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+    }
+}

src/main/java/com/ironhack/script/script.txt

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+
+CREATE TABLE Authors (
+    AuthorID INT PRIMARY KEY AUTO_INCREMENT,
+    AuthorName VARCHAR(255) NOT NULL
+);
+
+
+CREATE TABLE Posts (
+    PostID INT PRIMARY KEY AUTO_INCREMENT,
+    AuthorID INT,
+    Title VARCHAR(255) NOT NULL,
+    WordCount INT,
+    Views INT,
+    FOREIGN KEY (AuthorID) REFERENCES Authors(AuthorID)
+);
+
+
+
+CREATE TABLE Customers (
+    CustomerID INT PRIMARY KEY AUTO_INCREMENT,
+    CustomerName VARCHAR(255) NOT NULL,
+    CustomerStatus VARCHAR(50)
+);
+
+
+CREATE TABLE Flights (
+    FlightNumber VARCHAR(10) PRIMARY KEY,
+    Aircraft VARCHAR(50),
+    TotalAircraftSeats INT,
+    FlightMileage INT
+);
+
+
+CREATE TABLE CustomerFlights (
+    CustomerID INT,
+    FlightNumber VARCHAR(10),
+    TotalCustomerMileage INT,
+    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID),
+    FOREIGN KEY (FlightNumber) REFERENCES Flights(FlightNumber),
+    PRIMARY KEY (CustomerID, FlightNumber)
+);
+
+
+SELECT COUNT(DISTINCT FlightNumber) AS TotalFlights
+FROM CustomerFlights;
+
+SELECT AVG(FlightMileage) AS AverageFlightDistance
+FROM Flights;
+
+SELECT AVG(TotalAircraftSeats) AS AverageSeats
+FROM Flights;
+
+SELECT c.CustomerStatus, AVG(cf.TotalCustomerMileage) AS AverageMiles
+FROM CustomerFlights cf
+JOIN Customers c ON cf.CustomerID = c.CustomerID
+GROUP BY c.CustomerStatus;
+
+SELECT c.CustomerStatus, MAX(cf.TotalCustomerMileage) AS MaxMiles
+FROM CustomerFlights cf
+JOIN Customers c ON cf.CustomerID = c.CustomerID
+GROUP BY c.CustomerStatus;
+
+SELECT COUNT(DISTINCT Aircraft) AS TotalBoeingAircraft
+FROM Flights
+WHERE Aircraft LIKE '%Boeing%';
+
+SELECT FlightNumber, FlightMileage
+FROM Flights
+WHERE FlightMileage BETWEEN 300 AND 2000;
+
+SELECT c.CustomerStatus, AVG(f.FlightMileage) AS AverageFlightDistance
+FROM CustomerFlights cf
+JOIN Customers c ON cf.CustomerID = c.CustomerID
+JOIN Flights f ON cf.FlightNumber = f.FlightNumber
+GROUP BY c.CustomerStatus;
+
+SELECT f.Aircraft, COUNT(*) AS BookingCount
+FROM CustomerFlights cf
+JOIN Customers c ON cf.CustomerID = c.CustomerID
+JOIN Flights f ON cf.FlightNumber = f.FlightNumber
+WHERE c.CustomerStatus = 'Gold'
+GROUP BY f.Aircraft
+ORDER BY BookingCount DESC
+LIMIT 1;