Question

I want to link Oracle database with SQL server. I have used SQL Server’s builtin LinkedServer SPs but it returned the following error.

Cannot initialize the data source object of OLE DB provider “MSDAORA”
for linked server “OracleLinkedServer”.

I have used the following commands in SQL Server Express 2008 to create a linked server.

EXEC sp_addlinkedserver   'OracleLinkedServer', 'Oracle',   'MSDAORA', 'OracleServer' 

EXEC sp_addlinkedsrvlogin 'OracleLinkedServer', false,  'sa', 'system',  '123456'

select * from OracleLinkedServer..system.CIL_NOTIFICATION

Thanks in advance for helping me.

Answer 1

I have found the solution of this problem. The version of Oracle application, which I have installed, is 11gR1

My Oracle database was not started and mounted, so I used startup command

Then I have checked the listener of the database, It should be started.

Then I have modified the statements mentioned in the question. Here is the modification.

--add a linked server into SQL server
--parameters: serverName, ServerProduct, ProviderName, DataSource / Listener Name of desired database
EXEC sp_addlinkedserver   'OracleLinkedServer', 'Oracle',   'MSDAORA', 'PC-2.my.xgen/nb' 

--add login information into linked server
EXEC sp_addlinkedsrvlogin 'OracleLinkedServer', false,  Null, 'system',  '123456'

select * from OracleLinkedServer..SYSTEM.CIL_NOTIFICATION

It returns all the records from the Oracle database table CIL_NOTIFICATION