Why is PyODBC throwing an 'IM002' error: 'Data source name not found and no default driver specified'?

Resolving PyODBC error: Data source not found and no default driver specified

When using PyODBC to connect to a SQL Server database, you may encounter the following error:

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

pyodbc.Error: ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified (0) (SQLDriverConnect)')</code>

This error indicates that the specified data source cannot be found and a default driver is not set. To resolve this issue, please follow these steps:

1. Explicitly specify the ODBC driver:

   PyODBC does not specify a specific ODBC driver by default. You need to explicitly indicate the driver you want to use in the connection string. In this example, the driver is "ODBC Driver 17 for SQL Server".

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

2. Update ODBC configuration:

   If you have multiple versions of ODBC installed, make sure the version you want to use is set as the default driver. You can check this setting in the ODBC Data Source Administrator tool.

   Open the Control Panel, search for "odbc", and then select "ODBC Data Source Manager (64-bit)". Under the "System DSN" tab, check that the correct ODBC driver is selected as the default driver. If not, select it and click Set as Default.

By specifying the appropriate ODBC driver and ensuring it is set to default, you should be able to successfully establish a connection to your SQL Server database using PyODBC.

The above is the detailed content of Why is PyODBC throwing an 'IM002' error: 'Data source name not found and no default driver specified'?. For more information, please follow other related articles on the PHP Chinese website!