无需注册即可用的不停给对方打电话的软件授权商城稳定的不停给对方打电话的软件
使用 MySQL 查询 ```sql SELECT created_at FROM users WHERE username = 'your_username'; ``` 使用 Python（MySQLdb）查询 ```python import MySQLdb db = MySQLdb.connect("host", "username", "password", "database") cursor = db.cursor() cursor.execute("SELECT created_at FROM users WHERE username = %s", ('your_username',)) result = cursor.fetchone() print(result[0]) cursor.close() db.close() ``` 使用 PHP（mysqli）查询 ```php $mysqli = new mysqli("host", "username", "password", "database"); $stmt = $mysqli->prepare("SELECT created_at FROM users WHERE username = ?"); $stmt->bind_param("s", $username); $username = 'your_username'; $stmt->execute(); $stmt->bind_result($created_at); $stmt->fetch(); echo $created_at; $stmt->close(); $mysqli->close(); ?> ``` 注意： 确保用你的实际用户名替换 `your_username`。 对于其他编程语言，请参考相应的数据库连接库的文档以获得具体查询方法。
