Error connecting to Oracle 11g Database

Hi All
I am testing .NET connectivity to Oracle 11g and I am not successful for a while.
I've tried to connect to database using library included in Oracle 10.2.0.3 Client and as a result I've got "invalid username or password" error. Then I've tried to use ORAC 11.1.0.5.10beta. I successfully connected to the server, but when I try to exec any query my program hangs.
Both of them work correctly with Oracle 9i database.
Also I've tried Microsoft .NET provider and it connects and executes queries fine (though 3 times slower).
How do you think what is reason or how can I find the reason?

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Failover not working while connecting to Oracle 11g database

Hi,
We have a J2EE application that connects to Oracle 11g database.
The connection URL we are using is as below
jdbc:oracle:thin:@(DESCRIPTION =(SDU=32768)(ADDRESS=(PROTOCOL=TCP)(HOST=abc.hostname.com)(PORT=1525))(ADDRESS=(PROTOCOL=TCP)(HOST= xyz.hostname.com)(PORT=1525))(CONNECT_DATA=(SERVICE_NAME=PQR)))
The issue that we are facing is, the database failover is not working.The application only connects to the first host in the TNS entry.Evertime there is a failure in the connection to the first host,manual steps are required to swap the hosts.
This started happening after we upgraded Oracle DB from 9i to 11g.
We are using the client jar of 9i to connect to 11g. Could this be causing the problem?
Thanks In Advance.
-Tara

889517 wrote:
Yes, you are right. Nothing else was updated.
The application still works as expected except the failover.If you are correct then I seriously doubt it has anything to do with java. It would be something to do with Oracle and/or network infrastructure.
If not then it is some small problem with the driver. You can try updating the driver but I wouldn't expect a fix.

Forms 6i is not connecting with Oracle 11g database?

Forms 6i is not connecting with Oracle 11g database?
How to resolve this issue?

Hi,
Once you installed the Forms and Reports, you need to configure the paramters like tnsnames.ora in you path.
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Not able to connect to oracle 11g database source through OBI Server

Hi,
I am having an issue regarding the database connectivity.
Iam unable to connect to the oracle 11g database through OBI server. However its connecting through SQL Plus with same username/password@hoststring. Its giving the error as :
[nQSError: 17001]Oracle Error code:1017,message:ORA-01017: invalid username/password; logon denied at OCI call OCILogon
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If it's working in one place and not the other then it's obviously not an OBIEE problem.
Are you typing it in right??
Do you have multiple tnsnames.ora files pointing to different databases, maybe sqlplus is picking up one and toad & OBIEE the other and so the username/pw is wrong for that database?
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Can Oracle 8.0.6 reports connects to Oracle 11g Database

Hi,
I know Oracle 8.0.6 report is already out of support. I want to build some environement. In this context, I want to know, where Oracle Reports 8.0.6 can connect to Oracle 11g R2 database ?
Pl suggest me urgently.
thanks & regards
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First of all: using the word 'urgently' is inappropriate and rude in a forum of volunteers.
Edit your post and apologize publicly for using it.
Secondly your question is a rhetorical one, as it's answer is:
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was succeeded by
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8.1.6
8.1.7
9.0.1
9.2.0
10.1.0
10.2.0
11.0.1
11.0.2
NINE releases in between!!!
Sybrand Bakker
Senior Oracle DBA

Issue in Connecting to Oracle 11g Database

Hi,
I have installed Oracle 11g database using loopback adapter. (used ip 10.10.10.10). In the drivers file did the following entry
ipaddress computername.domainname.com computername
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Thanks,
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from other computer in the network Oracle version on that computer ?
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*Crystal Reports 2008 connection to oracle 11g database error IM003*

Hi ,
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Hello,
I haven't seen that error in years... There was a version of Oracles client that did not put the client install into the PATH statement.
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JDBC Drivers for Weblogic to connect to Oracle 11g database

WebLogic Server Version: 10.3.6.0
We had Oracle 10g database that we were connecting using JDBC data source (driver : Oracle's Driver (Thin XA) for instance connections; versions:9.0.1 and later). We migrated our database to 11g now. Is it still the best driver to connect to 11g database or should we change it to something else?

why not using an 11 driver to connect to db 11g?
maybe the following posting helps although is focuses on db 12c:
https://blogs.oracle.com/WebLogicServer/entry/part_1_12c_database_and
best wishes.
Blog: Oracle Fusion Middleware and Cloud Computing

How To Connect To Oracle 11g Database From Microsoft Excel

Hi All,
I have Windows7 64bit installed in my laptop.
I have Microsoft Excel 2007 installed.
I tried connecting to Oracle database ( This is not a local database).
Navigation used:
Data> From Other Sources > From Data Connection Wizard > Other/Advanced > Next > Microsoft OLE DB Provider For Oracle > OK
Now I get a pop up to enter:
username
password
server
When I enter all the required details I get this error "ORA-06413 CONNECTION NOT OPEN"
Is there no need to give PORT number?
Thanks,
Vishwamber Shetty

Hi,
Did you install oracle client on the machine? Can you do "tnsping <SID>"? Can you connect to DB using sqlplus ?
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Error Connecting to Oracle 9i Database

Ok I have a semi large program and a part of it connects to an Oracle 9i databse. I am using Visual Age for Java IDE and I am getting an error of
"java.sql.SQLException: [Microsoft][ODBC driver for Oracle][Oracle]ORA-00917: missing comma"
Of course the prog compiles but something is wrong with the my connectivity/
Below is my code listed below for jsut the Class that opens the Database Connection if you need further information please respond back
Thanks
p
//Code Below//
package musicmatch_library_test;
import java.io.*;
import java.util.*;
import java.sql.*;
public class SQLOutput
     private BufferedReader inFile;
     private PrintWriter sqlStream;
     private GUI g = Main.getGUIInstance();
     private FileChange fc = Main.getFileChangeInstance();
     private String url;
     protected ArrayList driveAL = new ArrayList();
     protected ArrayList folderAL = new ArrayList();
     protected ArrayList genreAL = new ArrayList();
     protected ArrayList artistAL = new ArrayList();
     protected ArrayList composerAL = new ArrayList();
     protected ArrayList albumTitleAL = new ArrayList();
     protected ArrayList trackNumAL = new ArrayList();
     protected ArrayList songTitleAL = new ArrayList();
* SQLOutput constructor comment.
public SQLOutput()
     super();
* Insert the method's description here.
* Creation date: (2/20/2003 8:28:50 PM)
public void writeSQLFile()
     url = "jdbc:odbc:mainDb";
     String insert = "insert into LibraryInfo ";
     String begColNames = "(artistname, cdtitle, songtitle,track genre) values (";
     String endColNames = ");";
     try
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");          //load DB driver
          Connection con = DriverManager.getConnection(url,"fake", "fake"); //create DB connection
          Statement stmt = con.createStatement();                    //create instance of connection to run DB commands
                                                                           //instance of an active connection to create a Statement object
          sqlStream = new PrintWriter (new FileWriter(g.returnOpenOrSave().getParent().toString()+"/sqlWrite.txt"));
          //inFile = new BufferedReader(new FileReader(g.returnOpenOrSave()));
          //String line = inFile.readLine();
          int c =0;
          while(c!=songTitleAL.size())
               sqlStream.println(insert + begColNames+artistAL.get(c) + ','+ albumTitleAL.get(c) + ',' + songTitleAL.get(c) +',' + trackNumAL.get(c) +',' + genreAL.get(c) + endColNames);
               stmt.executeUpdate(insert + begColNames+artistAL.get(c) + ','+ albumTitleAL.get(c) + ',' + songTitleAL.get(c) +',' + trackNumAL.get(c) +',' + genreAL.get(c) + endColNames);
               //line = inFile.readLine();
               c++;
          }//end for
          //inFile.close();
          //g.returnSavedFileName().delete();          //delete saved file
          sqlStream.close();
          con.close();
          stmt.close();
     catch(FileNotFoundException e)
          System.out.println("cant read input file");
     catch(IOException e)
          System.out.println("file error #2");
     catch(ClassNotFoundException e)
          System.out.println(e);
     catch(SQLException e)
          System.out.println(e);

i don't think its your connection. You must be hitting the DB otherwise you would not be getting an ORA error returned wrapped in an SQLException. I think its your pseudo-SQL, it simply says that you are missing a comma in an update string. Realistically, it could be that it is being misled into looking for a comma, probably because you have put a ';' at the end of your update string...

Error while creating a JDBC connection to Oracle 11g using WLS 6.1

Hi
I am trying to connect to Oracle 11g database on Weblogic 6.1 server.
First of all i would like to know if this is compatible?
The environement that i have is this
1. JDK 1.3
2. Database 11g is on remote system
3. Oracle client on my local system ( Connecting to the 11g DB through the client works fine)
4. Weblogic server 6.1
5. Currently the application is connected to Oracle 10g DB and working fine(We are attempting to move it to 11g)
Below are the steps that i followed to create the connection:
1. Made an entry for the datasource in config.xml under <WLS_DOMAIN>/config folder as below
<JDBCConnectionPool DriverName="oracle.jdbc.driver.OracleDriver"
MaxCapacity="4" Name="CADConnectionPool"
Properties="user=abc_proxy;password=proxy_abc;dll=ocijdbc8;protocol=thin"
RefreshMinutes="5" ShrinkPeriodMinutes="10" Targets="CAsvr"
TestConnectionsOnRelease="true" TestConnectionsOnReserve="true"
TestTableName="dual" URL="jdbc:oracle:thin:@gen11t-ora.db.lab.xyz.com:1530:GEN11T"/>
2. Restarted the server.
3. Ran the application and get the following error on the server console:
<Aug 22, 2011 12:39:42 AM CDT> <Error> <JDBC> <Cannot startup connection pool "C
ADConnectionPool" weblogic.common.ResourceException:
Could not create pool connection. The DBMS driver exception was:
java.lang.ArrayIndexOutOfBoundsException
at oracle.security.o3logon.C0.r(C0)
at oracle.security.o3logon.C0.l(C0)
at oracle.security.o3logon.C1.c(C1)
at oracle.security.o3logon.O3LoginClientHelper.getEPasswd(O3LoginClientH
elper)
at oracle.jdbc.ttc7.O3log.<init>(O3log.java:289)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:251)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:246)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:365)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:260)
at weblogic.jdbc.common.internal.ConnectionEnvFactory.makeConnection(Con
nectionEnvFactory.java:193)
at weblogic.jdbc.common.internal.ConnectionEnvFactory.createResource(Con
nectionEnvFactory.java:134)
at weblogic.common.internal.ResourceAllocator.makeResources(ResourceAllo
cator.java:705)
at weblogic.common.internal.ResourceAllocator.<init>(ResourceAllocator.j
ava:282)
at weblogic.jdbc.common.internal.ConnectionPool.startup(ConnectionPool.j
ava:650)
at weblogic.jdbc.common.JDBCService.addDeployment(JDBCService.java:107)
at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(Depl
oymentTarget.java:360)
at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(Dep
loymentTarget.java:285)
at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeploy
ments(DeploymentTarget.java:239)
at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(
DeploymentTarget.java:199)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMB
eanImpl.java:636)
at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl
.java:621)
at weblogic.management.internal.ConfigurationMBeanImpl.invoke(Configurat
ionMBeanImpl.java:360)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
57)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
25)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
at $Proxy31.updateDeployments(Unknown Source)
at weblogic.management.configuration.ServerMBean_CachingStub.updateDeplo
yments(ServerMBean_CachingStub.java:2977)
at weblogic.management.mbeans.custom.ApplicationManager.startConfigManag
er(ApplicationManager.java:372)
at weblogic.management.mbeans.custom.ApplicationManager.start(Applicatio
nManager.java:160)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMB
eanImpl.java:636)
at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl
.java:621)
at weblogic.management.internal.ConfigurationMBeanImpl.invoke(Configurat
ionMBeanImpl.java:360)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
57)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
25)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
at $Proxy42.start(Unknown Source)
at weblogic.management.configuration.ApplicationManagerMBean_CachingStub
.start(ApplicationManagerMBean_CachingStub.java:480)
at weblogic.management.Admin.startApplicationManager(Admin.java:1234)
at weblogic.management.Admin.finish(Admin.java:644)
at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:524)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:207)
at weblogic.Server.main(Server.java:35)
at weblogic.jdbc.common.internal.ConnectionEnvFactory.makeConnection(Con
nectionEnvFactory.java:209)
at weblogic.jdbc.common.internal.ConnectionEnvFactory.createResource(Con
nectionEnvFactory.java:134)
at weblogic.common.internal.ResourceAllocator.makeResources(ResourceAllo
cator.java:705)
at weblogic.common.internal.ResourceAllocator.<init>(ResourceAllocator.j
ava:282)
at weblogic.jdbc.common.internal.ConnectionPool.startup(ConnectionPool.j
ava:650)
at weblogic.jdbc.common.JDBCService.addDeployment(JDBCService.java:107)
at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(Depl
oymentTarget.java:360)
at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(Dep
loymentTarget.java:285)
at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeploy
ments(DeploymentTarget.java:239)
at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(
DeploymentTarget.java:199)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMB
eanImpl.java:636)
at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl
.java:621)
at weblogic.management.internal.ConfigurationMBeanImpl.invoke(Configurat
ionMBeanImpl.java:360)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
57)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
25)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
at $Proxy31.updateDeployments(Unknown Source)
at weblogic.management.configuration.ServerMBean_CachingStub.updateDeplo
yments(ServerMBean_CachingStub.java:2977)
at weblogic.management.mbeans.custom.ApplicationManager.startConfigManag
er(ApplicationManager.java:372)
at weblogic.management.mbeans.custom.ApplicationManager.start(Applicatio
nManager.java:160)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMB
eanImpl.java:636)
at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl
.java:621)
at weblogic.management.internal.ConfigurationMBeanImpl.invoke(Configurat
ionMBeanImpl.java:360)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
57)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
25)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
at $Proxy42.start(Unknown Source)
at weblogic.management.configuration.ApplicationManagerMBean_CachingStub
.start(ApplicationManagerMBean_CachingStub.java:480)
at weblogic.management.Admin.startApplicationManager(Admin.java:1234)
at weblogic.management.Admin.finish(Admin.java:644)
at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:524)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:207)
at weblogic.Server.main(Server.java:35)
Can't load scjd12.dll, file not found java.library.path=C:\jdk1.3.1_11\bin;.;C:\WINDOWS\system32;C:\WINDOWS;.\bin;C:\P
rogram Files\Lotus\Notes\Data;C:\Program Files\Lotus\Notes;C:\Program Files\Java
\jre1.5.0_17\bin;C:\Program Files\Java\j2re1.4.2_06\bin;C:\Oracle\bin;C:\Program
Files\Oracle\jre\1.3.1\bin;C:\Program Files\Oracle\jre\1.1.8\bin;C:\WINDOWS\sys
tem32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\system32\nls;C:\WINDOWS\sys
tem32\nls\ENGLISH;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Rational
\common;C:\Program Files\Rational\ClearCase\bin;C:\apache-ant-1.6.5\bin;C:\jdk1.
3.1_11\bin;C:\Program Files\Citrix\ICAService\;C:\Program Files\Citrix\System32\
;Z:.
<Aug 22, 2011 12:38:06 AM CDT> <Info> <JDBC> <Sleeping in createResource()>
<Aug 22, 2011 12:38:07 AM CDT> <Error> <JDBC> <Cannot startup connection pool "c
ispool" weblogic.common.ResourceException:
Could not load 'com.neon.jdbc.Driver
If this is a type-4 JDBC driver, it could occur if the JDBC
driver is not in the system CLASSPATH.
If this is a type-2 JDBC driver, it may also indicate that
the Driver native layers(DBMS client lib or driver DLL)
have not been installed properly on your system
or in your PATH environment variable.
This is most likely caused by one of the following:
1. The native layer SO, SL, or DLL could not be found.
2. The file permissions on the native layer SO, SL, or DLL
have not been set properly.
3. The native layer SO, SL, or DLL exists, but is either
invalid or corrupted.
For more information, read the installation documentation
for your JDBC Driver, available from:
http://e-docs.bea.com
at weblogic.jdbc.common.internal.ConnectionEnvFactory.makeConnection(Con
nectionEnvFactory.java:212)
at weblogic.jdbc.common.internal.ConnectionEnvFactory.createResource(Con
nectionEnvFactory.java:134)
at weblogic.common.internal.ResourceAllocator.makeResources(ResourceAllo
cator.java:705)
at weblogic.common.internal.ResourceAllocator.<init>(ResourceAllocator.j
ava:282)
at weblogic.jdbc.common.internal.ConnectionPool.startup(ConnectionPool.j
ava:650)
at weblogic.jdbc.common.JDBCService.addDeployment(JDBCService.java:107)
at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(Depl
oymentTarget.java:360)
at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(Dep
loymentTarget.java:285)
at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeploy
ments(DeploymentTarget.java:239)
at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(
DeploymentTarget.java:199)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMB
eanImpl.java:636)
at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl
.java:621)
at weblogic.management.internal.ConfigurationMBeanImpl.invoke(Configurat
ionMBeanImpl.java:360)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
57)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
25)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
at $Proxy31.updateDeployments(Unknown Source)
at weblogic.management.configuration.ServerMBean_CachingStub.updateDeplo
yments(ServerMBean_CachingStub.java:2977)
at weblogic.management.mbeans.custom.ApplicationManager.startConfigManag
er(ApplicationManager.java:372)
at weblogic.management.mbeans.custom.ApplicationManager.start(Applicatio
nManager.java:160)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMB
eanImpl.java:636)
at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl
.java:621)
at weblogic.management.internal.ConfigurationMBeanImpl.invoke(Configurat
ionMBeanImpl.java:360)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
57)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:15
25)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:468)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:209)
at $Proxy42.start(Unknown Source)
at weblogic.management.configuration.ApplicationManagerMBean_CachingStub
.start(ApplicationManagerMBean_CachingStub.java:480)
at weblogic.management.Admin.startApplicationManager(Admin.java:1234)
at weblogic.management.Admin.finish(Admin.java:644)
at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:524)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:207)
at weblogic.Server.main(Server.java:35)
Would like some help on this asap as the project is in critical stage.
Thanks

The driver being used by your weblogic is too old and incompatible with the DBMS. Upgrade the driver.

ORA-12154 error when trying to connect to Oracle 11g DB from Excel 2010

All,
I am trying to set up Excel 2010 64-bit to connect to an Oracle 11g database, but am having some trouble due to an "ORA-12154 could not resolve the connect identifier specified" error. I am able to TNSping the SID name, as well as connect to SQLplus. The TNS entry works, and the Oracle Home is in the right spot. I am even able to put the full connection string in the "Data Source" field when creating a data link in Excel and have it connect to the DB. But I would like to be able to create one that used the SID rather than the full connection string, as other users will have to use this. The developer behind the Excel solution created a number of .odc files to connect to various databases, so this gives extra weight behind figuring out how to connect via a SID rather than a full connection string. Any suggestions?

user10832104 wrote:
All,
I am trying to set up Excel 2010 64-bit to connect to an Oracle 11g database, but am having some trouble due to an "ORA-12154 could not resolve the connect identifier specified" error. I am able to TNSping the SID name, as well as connect to SQLplus. The TNS entry works, and the Oracle Home is in the right spot. I am even able to put the full connection string in the "Data Source" field when creating a data link in Excel and have it connect to the DB. But I would like to be able to create one that used the SID rather than the full connection string, as other users will have to use this. The developer behind the Excel solution created a number of .odc files to connect to various databases, so this gives extra weight behind figuring out how to connect via a SID rather than a full connection string. Any suggestions?
If you are able to connect with sqlplus, then this really becomes a question of how to define a data connection in Excel.
But after quickly googling ..
In excel ...
"Data" tab
"from other sources"
"from data connection wizard"
select ODBC DSN
On data link properties, select the "connection" tab
select "Use Data Source Name" and hit the drop-down
select a dsn that you had previously set up to point to the oracle database.
Anyway, that looks like how it is supposed to be done. I'm getting a dll initialization error. Probably due to the fact I have both 32-bit and 64-bit oracle clients, and windows never handles that very gracefully. But then Windows never graceffully handles anything that isn't MicroSoft. To paraphrase Forest Gump, "My momma always said Windows was like a box of chocolates. You never know what you're going to get."
In any event, the error you report means it was actually tying to look it up in tnsnames, but what you supplied wasn't found there. That can also be a big issue when dealing with MS products, because they don't use the same terminology, so lead people into entering something other than what Oracle expects. Are you referencing an ODBC DSN? If so, have you tested that apart from Excel?

ORA-12504 error when connecting to Oracle 11G DB using OCI and instantclient-basic-nt-11.2.0.3.0.zip

Dear Friends,
I am using OCI and instant_client (11.2.0.3.0) in my C++ program (on Windows 7) to connect remotely to 11G database.
While doing a connection using server name as well as servername:port/service_name as connection strings, I am getting error of ORA-12504 TNS:listener was not given the SERVICE_NAME in CONNECT_DATA.
According to instant client FAQ & white paper at http://www.oracle.com/technetwork/database/features/instant-client/index.html, no tnsnames.ora is required for instant client. Then why could I be getting this error?
I ensured that only the instant client directory is in Path environment variable. There was a ODBC driver installed on this same host. Could that be modifying the behavior of instant client?
Kindly guide.
Many thanks in advance for your help and time.
Best Regards,
- ganesh

>>what is the exact connect string you are using?
For connection, I am using the plain hostname on which the DB server is running.
>>are you calling OCIServerAttach before OCISessionBegin?
I am not using OCISessionBegin. For connecting to DB server, I am using the following sequence of OCI calls (in this same order):
1) g_OCIEnvNlsCreate
2) g_OCIHandleAlloc //-- error handle: OCI_HTYPE_ERROR
3) g_OCIHandleAlloc // --- sevice context: OCI_HTYPE_SVCCTX
4) Setting driver name and application name for the session:
    OCISession* usersession = 0;
    ret = g_OCIAttrGet(m_pSvcCtx, OCI_HTYPE_SVCCTX, &usersession, NULL,
                             OCI_ATTR_SESSION, m_pErrHdl);
    if (ret == OCI_SUCCESS)
        ret = g_OCIAttrSet(usersession, OCI_HTYPE_SESSION, (void*)"OCI_DRV", 2,OCI_ATTR_DRIVER_NAME, m_pErrHdl);
        ret = g_OCIAttrSet(usersession, OCI_HTYPE_SESSION, (void*)"ClientApplication", <ub4>(strlen("DataReconScanning")), OCI_ATTR_CLIENT_IDENTIFIER, m_pErrHdl);
5) g_OCILogon() using the user, password and host name, as below:
g_OCILogon(m_pDbCon, m_pErrHdl, &m_pSvcCtx,
                               (text*)user.c_str(), static_cast<ub4>(user.length()),
                               (text*)pass.c_str(), static_cast<ub4>(pass.length()),
                               (text*)host.c_str(), static_cast<ub4>(host.length()));
Thanks.

Oracle Discoverer 4i (portal db - oracle 8i) connectivity issue with 11g database

Hi All
We have oracle discoverer 4i with portal db (oracle 8i).
We connect to the external databases using db links in the portal db and the reports will use the db link to retrieve the data from views in the external databases.
External databases we were connecting is oracle 10g version and now we have upgraded these databases to 11g version.
Now i have a created a new db link to this 11g database and i have created a new EUL in portal to connect to this 11g database.
But when i try to create a report using the discoverer from this new EUL after login to the discoverer we get a "cannot connect to database" error.
We have all the necesscary privilege to the user and the new database link works perfectly fine. (when we try to query directly using SQL plus from portal database using this db link the query works perfectly fine).
Im not sure if this is a compatibility issue in connecting from oracle disc 4i to a 11g database.
Can any one advise if this is the case and if there is any workaround for this?
Regards,
Raj

Are you saying you are having issues with a database link between 8i and 11g (pl post exact versions to 4 digits) ? If so, it should be expected as database links between these two versions are not supported. Is there a reason you cannot upgrade the portal database to at least 10gR2 ?
See MOS Doc 207303.1
HTH
Srini

Establish 32-bit ODBC connection to 64-bit Oracle 11g database

Hi Everyone,
Just to set the scene:
PC with Windows 2003 server x64 OS installed, Oracle 11g 11.1.0.7 64-bit installed and MS Office 2007 installed.
I am looking for advice on the best way to establish an ODBC link so that MS Access 2007 (32-bit) can connect to the Oracle 11g (64-bit) database.
There are known issues, see [http://support.microsoft.com/kb/942976|http://support.microsoft.com/kb/942976] (which I have hit) when attempting to use a 64-bit ODBC DSN within MS Access 2007. This means that I need to setup and install an Oracle 11g 32-bit ODBC driver to be used against the Oracle 11g database (TNS listener also running 64-bit).
Any thoughts on the best approach I should take to do this?
Regards,
Leigh.

The more information section of the MS support article doesn't give me much to go on other than to explain the differences in how user and system DSNs are displayed and managed between the 2 different bit versions of ODBC administrator and how this information is stored in the different registries (64-bit and WOW64).
I have been able to install 32-bit Oracle11g instantclient and its ODBC driver successfully and then in turn create the 32-bit ODBC DSN, however I am unable to connect to the 64-bit database when I attempt to test the DSN. I have updated the Windows PATH environment variable to include both the path of the Oracle11g DB server and instantclient homes as well as creating a TNS_ADMIN environment variable to point to the location of the Oracle11g TNSNAMES.ORA and the 64-bit 11g listener. However despite this I still get the error when testing the DSN:
Unable to connect
SQLState=S1000
[Oracle][ODBC][Ora]ORA-12541: TNS:no listener

Error connecting to Oracle 11g Database

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