Oracle Data Integrator is an ETL tool that has three main differentiators: 1) It uses a declarative, set-based design approach which allows for shorter implementation times and reduced learning curves compared to specialized ETL skills. 2) It can transform data directly in the existing RDBMS for high performance and lower costs versus using a separate ETL server. 3) It has hot-pluggable knowledge modules that provide a library of reusable templates to standardize best practices and reduce costs.