refactor for redundant code

mysql-code/Schema.sql

@@ -28,7 +28,6 @@ CREATE TABLE Category (
     Name VARCHAR(255) NOT NULL
 );
 
--- Product Entity
 CREATE TABLE Product (
     ProductID INT AUTO_INCREMENT PRIMARY KEY,
     Name VARCHAR(255) NOT NULL,
@@ -38,8 +37,22 @@ CREATE TABLE Product (
     Description TEXT,
     CategoryID INT NOT NULL,
     Date DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (UserID) REFERENCES User (UserID),
+    FOREIGN KEY (CategoryID) REFERENCES Category (CategoryID)
+);
+
+-- Product Entity
+CREATE TABLE Product (
+    ProductID INT AUTO_INCREMENT PRIMARY KEY,
+    Name VARCHAR(255) NOT NULL,
+    Price DECIMAL(10, 2) NOT NULL,
+    StockQuantity INT,
+    UserID INT,
+    Description TEXT,
+    CategoryID INT,
+    Date DATETIME DEFAULT CURRENT_TIMESTAMP,
     FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE SET NULL,
-    FOREIGN KEY (CategoryID) REFERENCES Category (CategoryID) ON DELETE SET NULL
+    FOREIGN KEY (CategoryID) REFERENCES Category (CategoryID)
 );
 
 -- Fixed Image_URL table
@@ -72,7 +85,7 @@ CREATE TABLE Transaction (
     Date DATETIME DEFAULT CURRENT_TIMESTAMP,
     PaymentStatus VARCHAR(50),
     FOREIGN KEY (UserID) REFERENCES User (UserID) ON DELETE CASCADE,
-    FOREIGN KEY (ProductID) REFERENCES Product (ProductID) ON DELETE SET NULL 
+    FOREIGN KEY (ProductID) REFERENCES Product (ProductID) ON DELETE SET NULL
 );
 
 -- Recommendation Entity (Many-to-One with User, Many-to-One with Product)