创建一个将SQL查询转换为Pandas df的函数

import pandas as pd
from sqlalchemy import create_engine
import pyodbc

def create_db_connection():
    server = 'your_server_name'
    database = 'your_database_name'
    username = 'your_username'
    password = 'your_password'
    driver = '{ODBC Driver 17 for SQL Server}'
    connection_string = f"mssql+pyodbc://{username}:{password}@{server}/{database}?driver={driver}"
    engine = create_engine(connection_string)
    return engine

def sql_to_df(sql_query):
    engine = create_db_connection()
    df = pd.read_sql_query(sql_query, engine)
    return df

sql_query = 'SELECT * FROM your_table_name'
df = sql_to_df(sql_query)
print(df)