title: what is the relationship between iodbc, freeTDS and odbc driver?
body: <p>what i know about odbc is a set of APIs to connect programming language and the database. For example in php on mac, if I need to connect to MSSerever,I may need to use iodbc for selecting php odbc driver. But what is freeTDS for? what is the correct process to connect with the msserver 2000 with PHP  on my mac?</p>