尝试使用 pyodbc 使用 python 连接到 sql server 时出错

Question

I'm trying to connect to sql server from a different computer. I'm using the following code. The odbc driver is installed and also pyodbc is installed.

import pyodbc 

server = 'SERVER'
database = 'DBNAME' 
username = 'SA' 
password = 'SQLPWD' 
conn = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)

However I'm receiving the following error.

Traceback (most recent call last):
File "test.py", line 7, in <module>
conn = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL 
Server};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)
pyodbc.InterfaceError: ('28000', "[28000] [Microsoft][ODBC Driver 17 for SQL Server][SQL 
Server]Login failed for user 'SA'. (18456) (SQLDriverConnect); [28000] [Microsoft][ODBC 
Driver 17 for SQL Server][SQL Server]Login failed for user 'SA'. (18456)")

I'm not sure where I'm going wrong and the older questions have not been much helpful. I'm new to Python.

Answer 1

Probably the problem is related to:

• SA access disabled ( REFERENCE )
• Wrong Server Authentication Selection ( REFERENCE )
• SQL Server is not open for remote access ( REFERENCE )

You can use SSMS to manage your server configuration.

IMPORTANT : As suggested by @Larnu is not a good idea use the sa user for remote access, create new user with limited access to the database & table is a better way to manage the server and secure it. Take a look here to better understand.

SA Access disabled

To enable it you have to do:

• Connect to your server with SSMS (Using the Windows Authentication )

  

• Open the Security --> Logins Section and double click on the user sa

  

• Open the page General type a Password and Confirm Password , go in the page Status and set the Login on Enabled .

  

Wrong Server Authentication Selection

• In the Object Explorer right-click on the server instance and open the Properties

  

• Open the page Security and check the option SQL Server and Windows Authentication mode

  

SQL Server is not open for remote access

• In the Object Explorer right-click on the server instance and open the Properties

• Open the page Connections and check Allow remote connections to this server

  

• Open your Start Menu and search for SQL Server Configuration Manager

• Under the SQL Server Network Configuration select Protocols for

• Double-Click on TCP/IP and croll to the buttom, set the TCP Port to 1433

• In the left pane of SQL Server Configuration Manager click SQL Server Services , right-click SQL Server<instance_name> , and click Restart.

Now the issues should be solved, if not take a look on how to add a rule to windows firewall in the section Configure a Windows Firewall for Database Engine Access of the reference