I recommend using DBD::ODBC with iodbc and freetds.

Note that freetds has to be compiled for iodbc, and DBD::ODBC does as well. Here is the install sequence I used recently: 

 # Install libiodbc
wget http://www.iodbc.org/downloads/iODBC/libiodbc-3.52.3.tar.gz &&
  tar -xzf libiodbc-3.52.3.tar.gz &&
  cd libiodbc-3.52.3 && 
  ./configure &&
  make &&
  make install


 # Install freetds
wget ftp://ftp.ibiblio.org/pub/Linux/ALPHA/freetds/stable/freetds-stab
+le.tgz                                
tar -xzf freetds-stable.tgz && 
  cd freetds-0.63 &&
  ./configure -with-iodbc && 
  make && 
  make install
 

 # Configure odbc.ini
echo "[pcas2006]
Database=pcas2006
Server=10.10.10.164
TDS_Version=8.0
Port=1433
Driver=/usr/local/lib/libtdsodbc.so" > /etc/odbc.ini


 # install DBD::ODBC
perl -MCPAN -e'get DBD::ODBC' &&
  cd ~/.cpan/build/DBD-ODBC-1.13 && 
  export ODBCHOME=/usr/local &&
  perl Makefile.PL &&
  make &&
  make install

[download]
Update I should note that this advice is only applicable when connecting from a non-microsoft OS. If connecting from windows you can use DBD::ODBC without freetds and iodbc.

In reply to Re: which module support to connect SQLServer - use DBD::ODBC with iodbc and freetds by imp
in thread which module support to connect SQLServer by shanthiann

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