PYODBC--Data source name not found and no default driver specified

Question

import pyodbc
connection = pyodbc.connect(\'Driver = {SQL Server};Server=SIWSQL43A\\SIMSSPROD43A;\'
                            \'Database=CSM_reporting;Trusted_Conn         


        

Answer 1

I'm using

Django 2.2

and got the same error while connecting to sql-server 2012. Spent lot of time to solve this issue and finally this worked.

I changed

'driver': 'ODBC Driver 13 for SQL Server'

to

'driver': 'SQL Server Native Client 11.0'

and it worked.

Answer 2

I faced this issue and was looking for the solution. Finally I was trying all the options from the https://github.com/mkleehammer/pyodbc/wiki/Connecting-to-SQL-Server-from-Windows , and for my MSSQL 12 only "{ODBC Driver 11 for SQL Server}" works. Just try it one by one. And the second important thing you have to get correct server name, because I thought preciously that I need to set \SQLEXPRESS in all of the cases, but found out that you have to set EXACTLY what you see in the server properties. Example on the screenshot:

Answer 3

Try below:

import pyodbc

server = 'servername'

database = 'DB'

username = 'UserName'

password = 'Password'

cnxn = pyodbc.connect('DRIVER={ODBC Driver 13 for SQL Server};SERVER='+server+';DATABASE='+database+';UID='+username+';PWD='+ password)

cursor = cnxn.cursor()


cursor.execute('SELECT * FROM Tbl')

for row in cursor:
    print('row = %r' % (row,))

Answer 4

Do not put a space after the Driver keyword in the connection string.

This fails on Windows ...

conn_str = (
    r'DRIVER = {SQL Server};'
    r'SERVER=(local)\SQLEXPRESS;'
    r'DATABASE=myDb;'
    r'Trusted_Connection=yes;'
)
cnxn = pyodbc.connect(conn_str)

... but this works:

conn_str = (
    r'DRIVER={SQL Server};'
    r'SERVER=(local)\SQLEXPRESS;'
    r'DATABASE=myDb;'
    r'Trusted_Connection=yes;'
)
cnxn = pyodbc.connect(conn_str)

Answer 5

Apart from the other answers, that considered the connection string itself, it might simply be necessary to download the correct odbc driver. My client just faced this issue when executing a python app, that required it. you can check this by pressing windows + typing "odbc". the correct driver should appear in the drivers tab.

Answer 6

The below code works magic.

 SQLALCHEMY_DATABASE_URI = "mssql+pyodbc://<servername>/<dbname>?driver=SQL Server Native Client 11.0?trusted_connection=yes?UID" \
                              "=<db_name>?PWD=<pass>"