Thanks hrishy,

I have very limited resources to implement HA. I cannot use Oracle RAC the moment. I have only two servers at my site, so I have deployed Data Guard (Physical Standby) on them.
I was asked to share data (specific columns) with another site (3rd Server) i.e It was required to send specific columns' data to 3rd Server (remote site). I did it using Oracle Streams.
Now I need suggestion/recommendation that should i configure streams at Standby database as well?
So that i can share data with 3rd server without any interruption.