如何在Python中验证SQL查询，如DDL语句？

# 导入MySQL Connector/Python库
import mysql.connector

# 建立与MySQL数据库的连接
cnx = mysql.connector.connect(user='your_username', password='your_password',
                              host='your_host', database='your_database')

# 导入psycopg2库
import psycopg2

# 建立与PostgreSQL数据库的连接
cnx = psycopg2.connect(user='your_username', password='your_password',
                       host='your_host', port='your_port', database='your_database')

# 导入pyodbc库
import pyodbc

# 建立与Microsoft SQL Server数据库的连接
cnx = pyodbc.connect(driver='{SQL Server}', server='your_server',
                     database='your_database', user='your_username', password='your_password')

# 创建游标对象
cursor = cnx.cursor()

# 执行SQL查询
query = "SELECT * FROM your_table"
cursor.execute(query)

# 获取所有结果
results = cursor.fetchall()

# 遍历结果
for row in results:
    print(row)

# 关闭游标和数据库连接
cursor.close()
cnx.close()