Why is My PyODBC Connection Failing with a 'Data Source Name Not Found' Error?

PyODBC data source name not found error solution

When using PyODBC to connect to a database, it is crucial to correctly specify the data source name and driver. If you receive a "Data source name not found" error message, the configuration specified is incorrect.

Solution: Specify the correct driver

To resolve this error, double-check the data source name and driver specified in the PyODBC connection string. The error message states that the specified driver is "SQL Server" but there is no driver definition in the connection string.

Find the correct driver version

The solution lies in finding the appropriate version of the ODBC driver for your system. Search for "odbc" in the local program list and check the installed version. In this case, version 17 is available.

Modified connection string

Once you have found the correct ODBC driver version, modify the connection string to include it explicitly:

<code>connection = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};'
                           'Server=SIWSQL43A\SIMSSPROD43A;'
                           'Database=CSM_reporting;'
                           'Trusted_Connection=yes;')</code>

By including the correct ODBC driver version in the connection string you should be able to resolve this error and successfully connect to the database.

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