Replication methods in oracle and MSSQL server database

In oracle/MSSQL database we can have  multiple replication /standby database available for DR purpose.

oracle to oracle replication methods


1.RAC --Real application cluster for High availability
2.oracle Data guard for standby DR
3.oracle golden gate replication methods
4.we can achieve oracle to oracle replication with streams

oracle to other database replication methods

1.we can do oracle to MSSQL server & IBM DB2  replication using golden gate.
2..we can do oracle to MSSQL server & IBM DB2  replication using gateway server
3.we can do oracle to MSSQL server & IBM DB2  replication using  drivers to support
4.we can do oracle to MSSQL server & IBM DB2  replication using  third party tools like DBmoto

MSQL server to oracle replication methods
1.we can do MSSQL server to oracle DB replication using golden gate
2.we can do MSSQL server to oracle DB replication using native MSSQl server replication method with publisher/ditribuitor/subscriber
3.we can do MSSQL server to oracle DB replication using third party tools like DBmoto
4.we can do MSSQL server to oracle DB replication using gateway server