If you take the suggestion above (to search CPAN), using "MSSQL" as your sole search term, you'll find
DBIx::SQLEngine::Driver::MSSQL with the precis, "Support Microsoft SQL Server via DBD::ODBC" (among many others).
Since you're seeking a way to deal with MSSQL, perhaps we're looking at Windows, in which case there's a possibility you're using ActiveState. In that case,
ppm search MSSQL
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1: Class-DBI-MSSQL
Class::DBI for MSSQL
Version: 0.122
Released: 2006-11-11
2: DBIx-MSSQLReporter
An module to connect Perl to MS SQL Server and MS Data Engine
Version: 1.04
Released: 2005-10-27
3: DBIx-TableReferences-MSSQL
Perl extension for getting information about declared referential c
+onstraints in MS SQL Server 2000 databases.
Version: 0.04
Released: 2008-07-14
4: Time-Piece-MSSQL
MSSQL-specific methods for Time::Piece
Version: 0.020
Released: 2006-11-13