Sqlite3 Tutorial Query Python Fixed -

Never use f-strings or % to insert variables into SQL. You risk . Always use ? placeholders.

def create_user(name: str, email: str, age: int) -> Optional[int]: """Fixed: Returns inserted user ID""" query = """ INSERT INTO users (name, email, age, created_at) VALUES (?, ?, ?, datetime('now')) """ try: with get_db_connection() as conn: cursor = conn.cursor() cursor.execute(query, (name, email, age)) return cursor.lastrowid except sqlite3.IntegrityError as e: print(f"User with email email already exists: e") return None except sqlite3.Error as e: print(f"Database error: e") return None sqlite3 tutorial query python fixed

This pattern ensures your SQLite3 queries are in any Python application. Never use f-strings or % to insert variables into SQL