I wan to make a direct connection form Arcmap to Postgresql.

I have ArcGIS for Desktop 10.1 on windows (64bit).

So I need to put "pg\_client\_windows64" libraries in C:\Program Files (x86)\ArcGIS\Desktop10.1\bin. Is this right?

Where to get "pg\_client\_windows64"libraries from?

Do I need to install ArcSDE?