XE :: 11g - Can't Connect To Database After Installation
Jan 31, 2013
I recently installed Oracle database 11g XE onto my home computer running Windows 32 bit, but I can't connect to the database. I also have Oracle 10g R2 installed on my computer, and I can still connect to it finely. When trying to make a connection in SQL DEVELOPER, I get this error
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
I tried to tnsping the XE database and it returns successfully.
C:>tnsping xe
TNS Ping Utility for 32-bit Windows: Version 11.2.0.2.0 - Production on 31-JAN-2
013 07:59:17
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
C:oraclexeapporacleproduct11.2.0server
etworkadminsqlnet.ora
[code]....
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Oct 6, 2010
I have the following computer/setup:
Acer laptop, Intel Processor w/ Windows 7 Professional (64-bit)
Delphi 2010 Professional
Oracle XE (+ the Oracle XE client that comes with it)
I cannot can't to the Oracle database from Delphi. The error I keep getting is:
Alias is not currently opened. [Oracle][ODBC][Ora]ORA-12154:TNS: could not resolve the connet identifier specified.
Here's what I've done:
1. Create an ODBC connection to my Oracle database
- run C:WindowsSysWOW64odbcad32.exe to open the ODBC administrator.
- Data source name: bt_user
- TNS Server Name: localhost/xe
- user bt_user
- Clicked "test connection" -- Success.
2. Open Delphi and drop a TDatabase component on my main form.
- Set the Alias Name property to "bt_user" (the alias I set up in ODBC)
- Set database name to "bt_user".
- Checked "connected".
Alternatively, I tried using the Delphi ADO components (the dbGo components).
- Drop TADOConnection component on my form.
- Select "connection string" and open the dialog.
- Click "build string".
- Select "Microsoft OLE DB Provider for ODBC Drivers" from the selection.
- In "use data source", select "bt_user" from the drop-down list (my ODBC connection from #1)
- Click "test connection".
Again the same error.
My questions are:
1. Can Delphi work with Oracle XE (Express Edition)?
2. If so, then do I need to install the "Instant Client"?
3. Will the instant client for Oracle 10g work with Oracle 10g XE?
4. Do I need to install any additional ODBC driver(s)?
5. Why was I successful in creating the ODBC connection in Windows, but it failed in Delphi?
6. Will Visual Studio.NET (C#) work with Oracle XE, and what are the steps for setting that up?
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Mar 20, 2013
My question is; I've been reading the Oracle database 11g R2 documentation at this link [URL]...
I passed a couple of days learning about all installation configuration parts including the desktop class and server class.As I was learning, So I had already downloaded Oracle Database Express 11g R2 for win32.
So as i had finished the installation guide I thought it's time to install the oracle now. I did it, and what I found was that there was not any option during installation that i read in above documentation. While trying to find about this difference i reached on documentation[URL]...
That is for express version only.
My question here is, Express edition, we use for learning purpose, But it doesn't look like it has all the stuff that we should learn during installation And what documentation I should follow from my above given two links?
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Oracle Database 11.2.0.3.0 64bitI have followed most steps of this link and I came to a stop at the point where I use the Network Configuration Assistant.I have selected the following
1) Directory Usage Configuration>
2) Microsoft Active Directory>
3) Operation (2nd): Select the directory server you want to use, and configure the directory server for Oracle usage.>
4) Input my AD hostname>
5) Then it displays a message that "The directory contains an older version of the required Oracle Schema. Directory usage configuration cannot continue without the correct Oracle Schema. If you have authorization to create the directory schema then you can upgrade the Oracle Schema now. Would you like to upgrade the Oracle Schema? I have selected: Yes, I want to upgrade... and thereafter I get the errors:
The Assistant is unable to create or upgrade the Oracle Schema for the following reason:
ConfigException: Could not upgrade the Oracle Schema: oracle.net.config.ConfigException: TNS-004409 Directory Service Errorcaused by: oracle.net.config.DirectoryServiceException: TNS - 04431: DirectoryService: no entries foundcaused by: oracle.net.ldap.NNFLException.You may need to upgrade the directory schema from a specific computer which directly supports your directory type.
Command Line Error Response
ConfigException: Could not check for the Oracle Schema: oracle.net.config.Config
Exception: TNS-04409: Directory service error caused by: oracle.net.config.DirectoryServiceException: TNS-04431: DirectorySe
rvice: no entries found caused by: oracle.net.ldap.NNFLException
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I downloaded the 11G 64bit for windows and unzipped the files into one folder and ran the setup.exe as an administrator. It opened up the java screen and I chose, create and configure a database. Next screen I chose, Desktop Class, when I click next it dies. It does not show me teh next screen. I went to the appdata folder and saw this error but not sure what to do EXCEPTION_ACCESS_VIOLATION (0xc0000005).
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bash-3.00$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.3.0 - Production on Wed Aug 29 00:54:03 2012
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
ERROR:
ORA-01075: you are currently logged on
As per Metalink note(215858.1) suggested in forums I have followed steps and produced results below.
bash-3.00$ sqlplus -prelim
SQL*Plus: Release 10.2.0.3.0 - Production on Tue Aug 28 23:28:02 2012
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Enter user-name: / as sysdba
SYS on test>oradebug help
SYS on test>oradebug setmypid
Statement processed.
SYS on test>oradebug hanganalyze 12
[code]...
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CODE
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XE =
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(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)
[code]....
# This file is actually generated by netca. But if customers choose to
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[code]....
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Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Prod
ction
Start Date 21-NOV-2012 20:28:48
Uptime 0 days 0 hr. 27 min. 32 sec
Trace Level off
[code].....
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