sql 如何连接云服务器

import psycopg2

# 连接参数
conn_params = {
    "host": "your_server_address",
    "database": "your_database_name",
    "user": "your_username",
    "password": "your_password",
    "port": "your_port_number"
}

try:
    # 建立连接
    conn = psycopg2.connect(**conn_params)
    print("Connected to the database successfully!")
    
    # 创建游标
    cur = conn.cursor()
    
    # 执行SQL命令
    cur.execute("SELECT version();")
    db_version = cur.fetchone()
    print(f"Database version: {db_version[0]}")
    
except (Exception, psycopg2.Error) as error:
    print(f"Error while connecting to PostgreSQL: {error}")
finally:
    # 关闭连接
    if conn:
        cur.close()
        conn.close()
        print("PostgreSQL connection is closed")