Update database

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database

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+# Step 1: Define Entities and Relationships
+
+# Example: Define entities and their relationships
+class User:
+    def __init__(self, user_id, username, email):
+        self.user_id = user_id
+        self.username = username
+        self.email = email
+
+class Course:
+    def __init__(self, course_id, title, description):
+        self.course_id = course_id
+        self.title = title
+        self.description = description
+
+# Step 2: Design Entity-Relationship Diagram (ERD)
+# Example: Visualize entities and relationships using a diagramming tool
+
+# Step 3: Define Database Tables
+
+# Example: Define database tables using SQL
+CREATE TABLE users (
+    user_id SERIAL PRIMARY KEY,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    email VARCHAR(100) UNIQUE NOT NULL
+);
+
+CREATE TABLE courses (
+    course_id SERIAL PRIMARY KEY,
+    title VARCHAR(100) NOT NULL,
+    description TEXT
+);
+
+# Step 4: Implement Schema in Database Management System (DBMS)
+# Example: Execute SQL statements to create tables in PostgreSQL
+
+# Step 5: Test Schema
+# Example: Populate database with sample data and perform tests to ensure functionality
+
+# Step 6: Integrate Schema into Software
+
+# Example: Connect to the database using an ORM like SQLAlchemy and define models
+from