feat: final ?

src/main/java/org/example/DonorsGenerator.java

@@ -18,7 +18,7 @@ public class DonorsGenerator {
             "Hiking", "Skiing", "Swimming", "Bird watching", "Racing", "Walking", "Gaming",
     };
 
-    private final Random RANDOM;
+    private static Random RANDOM;
 
     private static Connection conn;
 
@@ -27,7 +27,7 @@ public class DonorsGenerator {
     public DonorsGenerator(int recordCount, Connection conn, Random random) {
         DonorsGenerator.conn = conn;
         count = recordCount;
-        RANDOM = random;
+        DonorsGenerator.RANDOM = random;
     }
 
     public void insertDonors() throws SQLException {

src/main/java/org/example/Main.java

@@ -8,7 +8,7 @@ import java.util.Random;
 public class Main {
     // change the DB_URL accordingly
     static final String HOST = "localhost";
-    static final String PORT = "32772";
+    static final String PORT = "32768";
     static final String DATABASE_NAME = "assignment1";
 
     static final String DB_URL = "jdbc:mysql://" + HOST + ":" + PORT + "/" + DATABASE_NAME;

src/main/sql/answers.sql

@@ -0,0 +1,176 @@
+-- Question 1 part 1 a)
+CREATE TABLE Donors
+(
+    donorID       INT         NOT NULL,
+    firstName     VARCHAR(50) NOT NULL,
+    lastName      VARCHAR(50) NOT NULL,
+    middleInitial CHAR(1),
+    dateOfBirth   DATE,
+    address       VARCHAR(100), -- might need to change to civic code only
+    city          VARCHAR(50),
+    postalCode    VARCHAR(7),
+    province      ENUM (
+                      'AB',                   -- Alberta
+                      'BC',                   -- British Columbia
+                      'MB',                   -- Manitoba
+                      'NB',                   -- New Brunswick
+                      'NL',                   -- Newfoundland and Labrador
+                      'NS',                   -- Nova Scotia
+                      'NT',                   -- Northwest Territories
+                      'NU',                   -- Nunavut
+                      'ON',                   -- Ontario
+                      'PE',                   -- Prince Edward Island
+                      'QC',                   -- Quebec
+                      'SK',                   -- Saskatchewan
+                      'YT'                    -- Yukon
+                      ),
+    gender        ENUM ('M', 'F', 'U'),
+    SSN           VARCHAR(11),
+    hobby         VARCHAR(100),
+    phone         VARCHAR(15),
+    email         VARCHAR(100),
+    CONSTRAINT donors_pk PRIMARY KEY (donorID)
+);
+
+CREATE TABLE Donations
+(
+    dID     INT            NOT NULL,
+    donorID INT            NOT NULL,
+    date    DATE           NOT NULL,
+    type    VARCHAR(7)     NOT NULL,
+    amount  DECIMAL(10, 2) NOT NULL,
+    CONSTRAINT donations_pk PRIMARY KEY (dID),
+    CONSTRAINT donations_donorID_fk FOREIGN KEY (donorID) REFERENCES Donors (donorID),
+    CONSTRAINT valid_donation_type CHECK (type IN ('money', 'product'))
+);
+
+create table Products
+(
+    pID         INT            NOT NULL,
+    description varchar(100),
+    date        DATE           NOT NULL,
+    price       DECIMAL(10, 2) NOT NULL,
+    weight      DECIMAL(5, 2)  NOT NULL,
+    CONSTRAINT products_pk PRIMARY KEY (pID)
+);
+
+CREATE TABLE Sales
+(
+    sID         INT                      NOT NULL,
+    date        DATE                     NOT NULL,
+    amount      DECIMAL(10, 2)           NOT NULL,
+    totalWeight DECIMAL(10, 2)           NOT NULL,
+    deliveryFee DECIMAL(10, 2) DEFAULT 0 NOT NULL,
+    CONSTRAINT sales_pk primary key (sID),
+    CONSTRAINT valid_delivery_fee CHECK (deliveryFee >= 0)
+);
+
+CREATE TABLE SalesItems
+(
+    sID INT NOT NULL,
+    pID INT NOT NULL,
+    PRIMARY KEY (sID, pID),
+    FOREIGN KEY (sID) REFERENCES Sales (sID),
+    FOREIGN KEY (pID) REFERENCES Products (pID)
+);
+
+-- Question 1 part 1 b)
+ALTER TABLE Donors
+    DROP COLUMN hobby;
+
+-- Question 1 part 1 c)
+ALTER TABLE Products
+    ADD location VARCHAR(50) DEFAULT 'Unknown';
+ALTER TABLE Products
+    ADD color VARCHAR(10) DEFAULT 'Unknown';
+
+-- Question 1 part 1 d)
+-- !!! ASSUME THAT HOBBY COLUMN IS NO LONGER THERE
+INSERT INTO Donors (donorID, firstName, lastName, middleInitial, dateOfBirth, address, city, postalCode, province,
+                    gender, SSN, phone, email)
+VALUES (1, 'John', 'Smith', 'A', '1985-03-15', '123 Maple St', 'Toronto', 'M5V 2T6', 'ON', 'M', '123-456-789',
+        '(416) 555-1234', 'john.smith@email.com');
+
+INSERT INTO Donors (donorID, firstName, lastName, middleInitial, dateOfBirth, address, city, postalCode, province,
+                    gender, SSN, phone, email)
+VALUES (2, 'Emily', 'Johnson', 'M', '1990-07-22', '456 Oak Ave', 'Vancouver', 'V6B 3K9', 'BC', 'F', '987-654-321',
+        '(604) 555-5678', 'emily.j@email.com');
+
+INSERT INTO Donors (donorID, firstName, lastName, middleInitial, dateOfBirth, address, city, postalCode, province,
+                    gender, SSN, phone, email)
+VALUES (3, 'Alex', 'Lee', NULL, '1988-11-30', '789 Pine Rd', 'Montreal', 'H3A 1A1', 'QC', 'U', '456-789-123',
+        '(514) 555-9012', 'alex.lee@email.com');
+
+INSERT INTO Donations (dID, donorID, date, type, amount)
+VALUES (1, 1, '2023-05-15', 'money', 100.00);
+
+INSERT INTO Donations (dID, donorID, date, type, amount)
+VALUES (2, 2, '2023-06-22', 'product', 75.50);
+
+INSERT INTO Donations (dID, donorID, date, type, amount)
+VALUES (3, 3, '2023-07-03', 'money', 250.00);
+
+-- Question 1 part 1 e)
+DELETE
+FROM Donors
+WHERE donorID > 0;
+DELETE
+FROM Donations
+WHERE donorID > 0;
+
+-- Question 1 part 1 f)
+-- We have not covered ON DELETE/ ON UPDATE CASCADE
+-- in class so wer have to delete in such order of statements
+DROP TABLE Donations;
+DROP TABLE Donors;
+DROP TABLE SalesItems;
+DROP TABLE Products;
+DROP TABLE Sales;
+
+-- Question 1 part 2 a)
+SELECT Donors.donorID,
+       Donors.firstName,
+       Donors.lastName,
+       Donors.middleInitial,
+       Donors.dateOfBirth,
+       Donors.phone,
+       Donors.email,
+       Donors.SSN
+FROM Donors
+WHERE (Donors.gender = 'M')
+  AND (Donors.city = 'Montreal' OR Donors.city = 'Laval');
+
+-- Question 1 part 2 b)
+SELECT Sales.sID, Products.pID, Products.description, Products.price, Products.weight
+FROM Sales,
+     Products
+WHERE Products.color = 'red'
+  AND Sales.date = '2024-02-14';
+
+-- Question 1 part 2 c)
+-- One sID can have multiple products
+-- We need the DISTINCT keyword
+SELECT COUNT(DISTINCT sID)
+FROM Sales
+WHERE Sales.date = '2024-02-14';
+
+-- Question 1 part 2 d)
+SELECT EXTRACT(MONTH FROM date) AS month,
+       COUNT(DISTINCT sID)      AS total_sales,
+       SUM(amount)              AS total_amount,
+       SUM(deliveryFee)         AS total_delivery_fees
+FROM Sales
+WHERE EXTRACT(YEAR FROM date) = 2023
+GROUP BY EXTRACT(MONTH FROM date)
+ORDER BY month;
+
+-- Question 1 part 2 e)
+SELECT Donors.gender, Donors.lastName, Donors.firstName, SUM(Donations.amount) AS total_donation_amount
+FROM Donors,
+     Donations
+WHERE Donors.city = 'Brossard'
+  AND (Donations.date > '2022-01-01')
+  AND (Donations.date < '2023-12-31')
+GROUP BY Donors.donorID, Donors.gender, Donors.lastName, Donors.firstName
+ORDER BY Donors.gender, Donors.lastName, Donors.firstName;
+