Oracle Dataguard is the high availability solution for Oracle Databases.
Oracle DBA is one of the wonderful careers to opt for.
Exadata, one of the powerful machines of Oracle. Very very demandful in the market
Oracle Goldengate is the emerging and enhanced replication tool to connect multiple RDBMS.
Hadoop framework is the future of huge data storage requirements.
Oracle performance tuning is one of the core areas where always a need for expertise.
Oracle Real application clusters (RAC) is the high availability solution for Oracle databases.
SQL Server is one of the best rdbms in the market.