Not sure if its too late to reply this post, but always useful for current users facing similar problem.

Scenario 1: If DB connection is not successful while running perl code from cmd, please make sure you have perl driver installed.

Scenario 2: If DB connect is successful while running perl code from cmd and getting failed from Apache, please make sure to have appropriate driver in System DSN. Driver will depend upon DB you are trying to connect.

In reply to Re^3: connecting Perl with MS SQL Server on NT using ODBC by Anonymous Monk
in thread connecting Perl with MS SQL Server on NT using ODBC by peacemaker1820

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