API安全治理的全域监控平台评估报告中小企业跨平台应用零信任开发选型手册
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。
