云服务器数据库异常

-- 创建索引
CREATE INDEX idx_name ON table_name (column_name);

-- 查询优化
EXPLAIN SELECT * FROM table_name WHERE column_name = 'value';

import mysql.connector

try:
    conn = mysql.connector.connect(
        host="your_host",
        user="your_user",
        password="your_password",
        database="your_database"
    )
    print("Connection successful")
except mysql.connector.Error as err:
    print(f"Error: {err}")

from qcloud_cos import CosConfig
from qcloud_cos import CosS3Client
import sys
import logging

logging.basicConfig(level=logging.INFO, stream=sys.stdout)

secret_id = 'your_secret_id'
secret_key = 'your_secret_key'
region = 'your_region'
token = None  # 使用临时密钥需要传入 Token，默认为空，可不填
config = CosConfig(Region=region, SecretId=secret_id, SecretKey=secret_key, Token=token)
client = CosS3Client(config)

response = client.put_object(
    Bucket='your_bucket',
    Body=open('local_file_path', 'rb'),
    Key='backup_file_name'
)
print(response['ETag'])