Replication
Ÿ Streams asynchronously maintains multiple copies of
objects via automatic apply
Identical objects
Related via a transformation or function
Ÿ Streams automatically captures, propagates,  and
applies DML and DDL changes
Detects and optionally resolves conflicts
Ÿ Supports flexible data movement and subsetting
Ÿ Gateways and APIs for heterogeneous support
Ÿ Compatible with Materialized Views