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Oct 6, 2010I 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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Aug 25, 2010I have CPU based Oracle server license. In this case as per license policies of Oracle I can have unlimited database with unlimited users connecting it.
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Aug 29, 2012 My database in on 10.2.0.3 and facing hang problem when I am connecting to sqlplus.
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]...
Now I have got struck how to analyze above results.
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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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CODE
<?php
if (!$db = @ocilogon("big", "big", "s7s"))
{
$error = ocierror();
printf("Error was: %s", $error["message"]);
die();
}
$stmt = ociparse($db,"SELECT count(*) FROM members");
ociexecute($stmt);
?>
When I created the database the connection I used was s7s but whether or not I include that name or just use the ID/password that script will not connect.
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