initial db

SQL_code/schemas.sql

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+-- User Entity
+CREATE TABLE User (
+    UserID_PK INT PRIMARY KEY,
+    Password VARCHAR(255),
+    IP VARCHAR(15),
+    Name VARCHAR(100),
+    Email VARCHAR(255),
+    UCID VARCHAR(20),
+    Phone VARCHAR(20),
+    Role VARCHAR(50),
+    Address VARCHAR(255)
+);
+
+-- Buyer, Seller, Admin are roles within User (handled by Role attribute)
+
+-- Product Entity
+CREATE TABLE Product (
+    ProductID_PK INT PRIMARY KEY,
+    ProductID VARCHAR(50),
+    Price DECIMAL(10, 2),
+    Description TEXT,
+    StockQuantity INT
+);
+
+-- Category Entity
+CREATE TABLE Category (
+    CategoryID_PK INT PRIMARY KEY,
+    Name VARCHAR(100)
+);
+
+-- Review Entity (Many-to-One with User, Many-to-One with Product)
+CREATE TABLE Review (
+    ReviewID INT PRIMARY KEY,
+    UserID_FK INT,
+    ProductID_FK INT,
+    Comment TEXT,
+    Rating INT CHECK (Rating >= 1 AND Rating <= 5),
+    Date DATE,
+    FOREIGN KEY (UserID_FK) REFERENCES User(UserID_PK),
+    FOREIGN KEY (ProductID_FK) REFERENCES Product(ProductID_PK)
+);
+
+-- Transaction Entity (Many-to-One with User, Many-to-One with Product)
+CREATE TABLE Transaction (
+    TransactionID_PK INT PRIMARY KEY,
+    UserID_FK INT,
+    ProductID_FK INT,
+    Date DATE,
+    PaymentStatus VARCHAR(50),
+    FOREIGN KEY (UserID_FK) REFERENCES User(UserID_PK),
+    FOREIGN KEY (ProductID_FK) REFERENCES Product(ProductID_PK)
+);
+
+-- Recommendation Entity (Many-to-One with User, Many-to-One with Product)
+CREATE TABLE Recommendation (
+    RecommendationID_PK INT PRIMARY KEY,
+    UserID_FK INT,
+    RecommendedProductID_FK INT,
+    FOREIGN KEY (UserID_FK) REFERENCES User(UserID_PK),
+    FOREIGN KEY (RecommendedProductID_FK) REFERENCES Product(ProductID_PK)
+);
+
+-- History Entity (Many-to-One with User, Many-to-One with Product)
+CREATE TABLE History (
+    HistoryID INT PRIMARY KEY,
+    UserID_FK INT,
+    ProductID_FK INT,
+    TimeStamp DATETIME,
+    FOREIGN KEY (UserID_FK) REFERENCES User(UserID_PK),
+    FOREIGN KEY (ProductID_FK) REFERENCES Product(ProductID_PK)
+);
+
+-- Favorites Entity (Many-to-One with User, Many-to-One with Product)
+CREATE TABLE Favorites (
+    FavoriteID INT PRIMARY KEY,
+    UserID_FK INT,
+    ProductID_FK INT,
+    FOREIGN KEY (UserID_FK) REFERENCES User(UserID_PK),
+    FOREIGN KEY (ProductID_FK) REFERENCES Product(ProductID_PK)
+);
+
+-- Product-Category Junction Table (Many-to-Many)
+CREATE TABLE Product_Category (
+    ProductID_FK INT,
+    CategoryID_FK INT,
+    PRIMARY KEY (ProductID_FK, CategoryID_FK),
+    FOREIGN KEY (ProductID_FK) REFERENCES Product(ProductID_PK),
+    FOREIGN KEY (CategoryID_FK) REFERENCES Category(CategoryID_PK)
+);