NameError：名称“create_engine”未定义，

Question

I am attempting to create a python script that connects to an MS SQL Studio database and using SQLAlchemy to help with this. (I am learning databases and python), but I am trying to create a connection to a new database but keep getting this "create_engine" is not defined in SQLAlchemy error.

from sqlalchemy import create_engine
import pyodbc 
import pandas as pd

SERVER = 'BEAST-ACTIVE\SQLEXPRESS'  #FIND SERVER NAME
DATABASE = 'SQLTUTORIAL' #DATABASE TO CONNECT TO
DRIVER = 'SQL Server' #FIND DRIVER 
USERNAME = 'abcd'
PASSWORD = 'abcd123'
DATABASE_CONNECTION = f'msql://{USERNAME}:{PASSWORD}@{SERVER}/{DATABASE}?driver={DRIVER}'

engine = create_engine(DATABASE_CONNECTION)
connection = engine.connect()
data = pd.read_sql_query("SELECT * from 
[SQLTUTORIAL].[dbo].[EmployeeDemographics] 
order by [EmployeeID]", connection)
data.dtypese 

OUTPUT:

NameError                                 
Traceback (most recent call last)
Input In [1], in <cell line: 1>()
----> 1 engine = 
create_engine(DATABASE_CONNECTION)
      2 connection = engine.connect()
      3 data = pd.read_sql_query("SELECT * 
from [SQLTUTORIAL].[dbo]. 
[EmployeeDemographics] order by 
[EmployeeID]", connection)

NameError: name 'create_engine' is not defined

I am using Anaconda Jupyter Notebook 6.4.8 and MSSQLMS 18.12.1

Answer 1

Have you installed the prerequisite drivers and Python packages yet?

To install the SQLAlchemy package you need to execute the following in a Jupyter console:

pip install sqlalchemy

If you want to use Microsoft's more modern ODBC Driver 17 for SQL Server (or 18) for connectivity you need to download and install the appropriate driver from Microsoft and then install the pyodbc package from a Jupyter console:

pip install pyodbc

And then also change the line DRIVER = 'SQL Server' #FIND DRIVER to DRIVER = 'ODBC Driver 17 for SQL Server' #FIND DRIVER

The last line of your script also contains a typo: data.dtypese should be data.dtypes