How to identify clients connecting to a database

Is there a way to identify all clients connecting to a database? We have a system with over 1000 client connections, and the application teams do not know what clients are installed on each server/client.

Does this help?
http://myitforum.com/myitforumwp/2011/12/07/sql-query-to-identify-missing-smsconfigmgr-boundaries/
Cheers
Paul | sccmentor.wordpress.com

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How to change a connection with the database in Runtime?
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ADF Swing.
JDeveloper Studio 11.1.1.4.0.

When deploying ADF applications with database connection, you should be using JDBC data sources configured in the weblogic server.
You could change the JDBC data sources to a different DB instance or location - by changing the JDBC data source and restarting the weblogic server.
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Hi,
in order to identify clients I maintain a hash with references to
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# Generated by Oracle configuration tools.
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How to get clients connected in WMS on windows server 2008 with c# coding

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Hi SYaGCi,
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                    "]port[" + port +
                    "]driver[" + driver +
                    "]sid[" + sid +
                    "]admin[" + admin +
                    "]password[********]");
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          "))(CONNECT_DATA=(SID=" + sid + ")))";
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          con = null;
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If you want to use SSL, you will want to configure tcps for jdbc connection to the database, or any other form of connection and update your URL string for it.
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Hi all,
Ok, this may sound silly, but I have to write an application to access an Oracle database. Prior development in other languages has used ODBC and works fine. VS.NET using the OLE DB works as well.
However, I installed the ODT with ODAC 11.10.6.21 and tried that. I get an error trying to access the data.
When I execute the conn.open(), I get:
ORA-12154: TNS:could not resolve the connect identifier specified
I have opened the TNSNames.ora file and used that to create the connection string just in case. But I still get the error.
My guess is that either the client on my system is too old or the Oracle Server is still running an old version.
Is there an easy way for me to identify the latest client I have installed as well as the version of Oracle that is running on the server?
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http://www.oracle.com/technology/tech/dotnet/col/odt_faq.html#ORA-12154:_TNS:could_not_resolve_the

Typical resolution logic for client connection request (Oracle Database 11g)

Salam, hello everyone, I would know the process that oracle follows to connect a client to a database (local or remote connection) via this command : connect username/password[@connect_identifier].
Can someone help me with that?

The first decision is whether the connect request includes a connection string or not. Examples:
This does,
connect [email protected]
An this doesn't,
connect /
Your question regarding "LOCAL env var" I think is referring to client environment variables? They are tested with decisions for TNS_ADMIN,ORACLE_SID, and ORACLE_HOME at several points. Remember that the client process may be running on a remote machine, or on the server machine from the same Oracle Home as the instance or different.
That should give you a good start. If it doesn't, post your email and I'll send you a full description. The usual route for contacting authors is through the publisher, but we can short-circuit the process here.
Don't worry about Mr Bakker thinking that we do not understand SQL*Net. He has not seen any context, and his constructive criticism is based in incomplete data. You will soon understand SQL*Net better than most.
Please remove the diagram.

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Duffy is, as usual, correct. If you have a single-user environment, then holding onto a connection is probably okay (not desirable but also not pernicious). However, once you have more than one user, you will want to use a connection pool. Jakarta Commons (jakarta.apache.org) has an open source pool that is reliable.
But the fact that you are having additional problems makes me believe you are missing a few fundamental concepts, such as transactions. Even if the connection dropped, you should be able to reconnect without issue (granted, with some additional latency). The only time it would pose an issue (above and beyond the ones mentioned above and in previous replies) is if you are not managing your transactions properly.
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Message was edited by:
AB Shah

In the itvimsapp server execute the command
emctl status dbconsole
and see the name server and port, for example:
===================================
[oracle@bddesa oracle]$ emctl status dbconsole
TZ set to America/Guayaquil
Oracle Enterprise Manager 10g Database Control Release 10.1.0.3.0
Copyright (c) 1996, 2004 Oracle Corporation. All rights reserved.
http://bddesa:5500/em/console/aboutApplication
Oracle Enterprise Manager 10g is running.
===================================
If the server is running you can connect with the sentence
http://bddesa:5500/em or http://192.168.1.186:5500/em
I hope this help
Regards,
Wilson

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You could just look at the alert log. Look for "Recovery of Online Redo Log"
Or you could select from v$standby_apply_snapshot to see if the standby is up-to-date.
select thread#, to_char(snapshot_time,'dd-mon-yyyy:hh24:mi'),
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On APEX
Select SYS_CONTEXT('USERENV', 'OS_USER') From DUAL;
returns null
Is there another way to get the user OS?

on apex
owa_util.get_cgi_env('REMOTE_USER')
returns anonymous
on sqlplus
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return windows user (here)
on apex
SYS_CONTEXT('USERENV', 'OS_USER')
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How does it connect to the database

can anyone pls tell me how the below coding connect to the database, and if i want to change to use other type of connection, which part of the coding should i use? thank
loginAction.jsp
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<html>
<head>

<title>Untitled Document</title>

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<LINK href="bios.css" type=text/css rel=stylesheet>

</head>
<body leftmargin="0" topmargin="0">
<%@ include file="useAndImport.jsp" %>
<%
String username = (String)session.getAttribute("username");
session.setMaxInactiveInterval(10*60);
boolean isLoggedIn=work.isUsable(username)?true:false;
%>
<table width="100%" height="22" border="0" cellpadding="0" cellspacing="0" bgcolor="#CC3300" class="statusloginsearch">
<tr>
          <SCRIPT LANGUAGE="JavaScript">





</script>
<form action=loginAction.jsp method=POST>
<td width="77%" valign="baseline" nowrap id="statusbar"> <% if (isLoggedIn)
out.println("<img src=images/active.gif width=10 height=15 align=middle><font size=1 color=white face=Verdana, Arial, Helvetica, sans-serif><b>Welcome, " + username + " </b></font>");%> <% if (!isLoggedIn) { %>
<font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Username:</font><font size="1" face="Verdana, Arial, Helvetica, sans-serif">
<input type=text name=username class="form" <%= work.getValueAttribute(username) %> >
<font color="#FFFFFF"> Password:</font>
<input type=password name=password class="form">
<input type="submit" name="action" value="Login" class="formbutton" onfocus="this.blur()" onmouseover="this.className='formbuttonover';" onmouseout="this.className='formbutton';" onmousedown="this.className='formbuttonover';" onmouseup="this.className='formbuttonover';">
<input type="reset" name="action" value="Reset" class="formbutton" onfocus="this.blur()" onmouseover="this.className='formbuttonover';" onmouseout="this.className='formbutton';" onmousedown="this.className='formbuttonover';" onmouseup="this.className='formbuttonover';">
<img src="images/question.gif" alt="what's this?" width="15" height="15" border="0" align="middle">
<% } %>
</font></td>
</form>
<td width="23%" valign="baseline" nowrap id="statusbar"> <div align="right">
<% if (isLoggedIn)
out.println("<form action=SignOut.jsp method=POST><input type=submit name=action value=Logout class=formbutton onfocus=this.blur() onmouseover=this.className='formbuttonover'; onmouseout=this.className='formbutton'; onmousedown=this.className='formbuttonover'; onmouseup=this.className='formbuttonover';></form> <a href=tour.jsp><img src=images/newtothissite.gif border=0 align=middle></a>");%>
  </div></td>
</tr>
</table>
<table width="650" border="0" cellspacing="4" cellpadding="1">
<tr>
<td>
<table width="580" border="0">
<tr>
<td><strong><font color="#CCCCCC" size="+2" face="Arial, Helvetica, sans-serif">ERROR</font></strong></td>
</tr>
</table>
<%-- loginAction.jsp --%>
<%
String username1 = request.getParameter("username");
String password=request.getParameter("password");
boolean isUsername=work.isUsable(username1);
boolean isPassword=work.isUsable(password);
String usernameQuoted=work.getSingleQuoted(username1);
String usernameParam = work.makeUrlParameter("username",username1);
ResultSet resultset;
if(isUsername && isPassword) {
resultset=db.executeQuery
("SELECT * FROM users WHERE USERNAME = " + usernameQuoted);
if (resultset.next() &&
resultset.getString("password").equals(password))
out.println("<font color=green>You are logged on.</font>");
session.setAttribute("username", username1);
String accessLevel = resultset.getString("access_level");
     session.setAttribute("access", accessLevel);
     if(accessLevel.equals("0"))
     response.sendRedirect("Welcome.jsp");
     else if(accessLevel.equals("3"))
     response.sendRedirect("Admin.jsp");
%>
<%
} else {
out.print(work.tryAgain(
"<font size=2 color=red face=Verdana, Arial, Helvetica, sans-serif><b>Your username and/or password are incorrect.</b>",
"Login.jsp"+usernameParam));
} else {
out.print(work.tryAgain(
"<font size=2 color=red face=Verdana, Arial, Helvetica, sans-serif><b>Your login information is incomplete.",
"Login.jsp"+usernameParam));
%>

</td>
</tr>
</table>
</body>
</html>
useAndImport.jsp
<%-- thingsToUseAndImport.jsp --%>
<jsp:useBean id="db"
class="kw.search.DbAccess"
scope="application"/>
<jsp:useBean id="work"
class="kw.search.Worker"
scope="application"/>
<jsp:useBean id="dataB"
class="bb.messageBoard.DataB"
scope="application"/>
<jsp:useBean id="forum"
class="bb.messageBoard.Forum"
scope="application"/>
<%@ page import="java.text.DateFormat, java.util.Vector, java.io.*" %>
DbAccess.java
package kw.search;
import java.sql.*;
public class DbAccess implements java.io.Serializable {
private Connection connection;
private Statement statement;
String db = "btc";
String user = "javauser";
String password = "javauser";
String dbUrl = "jdbc:mysql://localhost:3306/" +db;
//dbUrl = "jdbc:mysql://localhost:3306/"+db;
public DbAccess ()
throws ClassNotFoundException, SQLException
Class.forName("com.mysql.jdbc.Driver");
//connection = DriverManager.getConnection ("jdbc:mysql://localhost:3306/btc?"+"user=javauser&password=javauser");
connection = DriverManager.getConnection
(dbUrl+"?user="+user+"&password="+password);
connection.setAutoCommit(false);
statement = connection.createStatement();
public void executeUpdate(String sqlCommand)
throws SQLException
statement.executeUpdate(sqlCommand);
public ResultSet executeQuery(String sqlCommand)
throws SQLException
return statement.executeQuery(sqlCommand);
public void commit() throws SQLException
connection.commit();
public void rollback() throws SQLException
connection.rollback();
protected void finalize() throws SQLException
statement.close();
connection.close();
}

This section of your code makes the connection:
public DbAccess ()
throws ClassNotFoundException, SQLException
Class.forName("com.mysql.jdbc.Driver");
//connection = DriverManager.getConnection ("jdbc:mysql://localhost:3306/btc?"+"user=javauser&password=javauser");
connection = DriverManager.getConnection
(dbUrl+"?user="+user+"&password="+password);
connection.setAutoCommit(false);
statement = connection.createStatement();
public void executeUpdate(String sqlCommand)
throws SQLException
statement.executeUpdate(sqlCommand);
public ResultSet executeQuery(String sqlCommand)
throws SQLException
return statement.executeQuery(sqlCommand);
public void commit() throws SQLException
connection.commit();
public void rollback() throws SQLException
connection.rollback();
}

How to identify clients connecting to a database

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