Configuring the SQL Server ODBC Driver - Delete a Data Source

Applies to: yesSQL Server (all supported versions) YesAzure SQL Database YesAzure SQL Managed Instance yesAzure Synapse Analytics yesAnalytics Platform System (PDW)

Before using ODBC applications with SQL Server 2005 (9.x) or later, you must know how to upgrade the version of the catalog stored procedures on earlier versions of SQL Server and add, delete, and test data sources.

You can delete a data source by using ODBC Administrator, programmatically (by using SQLConfigDataSource), or by deleting a file (if a file data source name).

To delete a data source by using ODBC Administrator

  1. In Control Panel, open Administrative Tools, and then double-click either ODBC Data Sources (64-bit) or ODBC Data Sources (32-bit). Alternatively, you can run odbcad32.exe from the command prompt.

  2. Click the User DSN, System DSN, or File DSN tab.

  3. Select the data source to delete.

  4. Click Remove, and then confirm the deletion.


To programmatically delete a data source, call SQLConfigDataSource using either ODBC_REMOVE_DSN or ODBC_REMOVE_SYS_DSN as the second parameter.

The following sample shows how you can programmatically delete a data source.

// remove_odbc_data_source.cpp  
// compile with: ODBCCP32.lib user32.lib  
#include <iostream>  
#include \<windows.h>  
#include \<odbcinst.h>  
int main() {   
   LPCSTR provider = "SQL Server";   // Windows SQL Server Driver  
   LPCSTR provider = "SQL Server";   // Windows SQL Server driver  
   LPCSTR provider2 = "SQL Server Native Client 11.0";   // SQL Server 2012 Native Client driver  
   LPCSTR dsnname = "DSN=data2";  
   BOOL retval = SQLConfigDataSource(NULL, ODBC_REMOVE_DSN, provider, dsnname);  
   std::cout << retval;   // 1 if successful  

See Also

Add a Data Source (ODBC)