Dblink creation between sql and oracle server

Hi dears,
I need to create dblink between the sql and oracle server.
(For me the requirement is sql datas need to import in oracle database).
My questions is,
Without installting gateway is't possibale to get the sql data in the oracle server.
my database version is 11.2.0.3 64bit
Kindly let me know, Waiting for your suggestsion.
Regards
Athish

About the Linked Server mechanism have a look at the MS Knowledge base article:
Article ID: 280106 - HOW TO: Set Up and Troubleshoot a Linked Server to Oracle in SQL Server
or
How to run a SQL Server 2005 Integration Services package as a SQL Server Agent job step Article ID : 912911
Regarding DG4ODBC and DG4MSQL, please have a look at our Support portal and look for the gateway master note:
Master Note for Oracle Gateway Products [Document 1083703.1]
It contains generic information how to connect to the foreign database
Document 233876.1 Options for Connecting to Foreign Data Stores and Non-Oracle Databases - For example - DB2, SQL*Server, Sybase, Informix, Teradata, MySQL
as well as the functional differences between the Database Gateway for ODBC (Generic Connectivity) and MS SQL Server
Document 252364.1 Functional Differences Between Generic Connectivity and Database Gateways
Document 232482.1 Gateway and Generic Connectivity Licensing Considerations
as well as where to find the latest release and how to install and configure them.

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Dblink creation between sql and oracle server

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