I've been working with QuantumGIS/PostgreSQL/postGIS for a while now, without problems. But now I have to change QuantumGIS for ArcGIS 10.1.

I'm having trouble adding a layer from PostgreSQL and being able to edit that layer. Basically I want to work directly with the DB, if I change something in the map it should be reflected on the database.

Can I do this without a Geodatabase? With a Geodatabase? I'm having trouble finding precise information.

Any help would be appreciated, Thanks