def update_user_age(user_id: int, new_age: int) -> bool: """Fixed: Returns success status""" query = "UPDATE users SET age = ? WHERE id = ?" with get_db_connection() as conn: cursor = conn.cursor() cursor.execute(query, (new_age, user_id)) return cursor.rowcount > 0 # True if user existed
@contextmanager def get_db_connection(db_path: str = "example.db"): conn = sqlite3.connect(db_path) conn.row_factory = sqlite3.Row # Access columns by name try: yield conn conn.commit() except Exception as e: conn.rollback() raise e finally: conn.close()
def safe_query(username): with sqlite3.connect('my_database.db') as conn: cursor = conn.cursor() cursor.execute( "SELECT * FROM users WHERE username = ?", (username,) # Note the comma for single parameter ) return cursor.fetchone()
: Use a colon followed by a name. This allows you to pass data as a dictionary, making complex queries more readable.
def add_user(name, email): with db_connection() as conn: cursor = conn.cursor() cursor.execute( "INSERT INTO users (name, email) VALUES (?, ?)", (name, email) ) return cursor.lastrowid
# single cur.execute("INSERT INTO users (name, email) VALUES (?, ?)", ("Alice", "alice@example.com")) # multiple users = [("Bob","bob@example.com"), ("Eve","eve@example.com")] cur.executemany("INSERT INTO users (name, email) VALUES (?, ?)", users)
create_tables()
Sqlite3 Tutorial Query Python Fixed Link
def update_user_age(user_id: int, new_age: int) -> bool: """Fixed: Returns success status""" query = "UPDATE users SET age = ? WHERE id = ?" with get_db_connection() as conn: cursor = conn.cursor() cursor.execute(query, (new_age, user_id)) return cursor.rowcount > 0 # True if user existed
@contextmanager def get_db_connection(db_path: str = "example.db"): conn = sqlite3.connect(db_path) conn.row_factory = sqlite3.Row # Access columns by name try: yield conn conn.commit() except Exception as e: conn.rollback() raise e finally: conn.close() sqlite3 tutorial query python fixed
def safe_query(username): with sqlite3.connect('my_database.db') as conn: cursor = conn.cursor() cursor.execute( "SELECT * FROM users WHERE username = ?", (username,) # Note the comma for single parameter ) return cursor.fetchone() email) VALUES (?
: Use a colon followed by a name. This allows you to pass data as a dictionary, making complex queries more readable. "alice@example.com")) # multiple users = [("Bob"
def add_user(name, email): with db_connection() as conn: cursor = conn.cursor() cursor.execute( "INSERT INTO users (name, email) VALUES (?, ?)", (name, email) ) return cursor.lastrowid
# single cur.execute("INSERT INTO users (name, email) VALUES (?, ?)", ("Alice", "alice@example.com")) # multiple users = [("Bob","bob@example.com"), ("Eve","eve@example.com")] cur.executemany("INSERT INTO users (name, email) VALUES (?, ?)", users)
create_tables()