SQL * more sysdba remote connection

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• SQL more unable to connect (computers connected via a DSL router)

  Hello!
  
  I have two computers connected locally via a DSL router. His IP address is 192.168.1.64 IP of the other is 192.168.1.65.
  "I'm trying to connect to 192.168.1.64 via SQL more 192.168.1.66 by running the following command: sqlplus system@"192.168.1.64/orcl.168.1.100 "and receive this error message:" ORA-12170: TNS: Connect timeout occurred. " I thought it was the default Windows Firewall that has caused this and changed the windows firewall settings in 192.168.1.64 adding port 1521 in the list of windows firewall. Now, I get this error: "ORA-12541: listener TNS:no.»
  
  Published by: totalnewby on June 12, 2010 10:53

  totalnewby wrote:
  Hello!

  I have two computers connected locally via a DSL router. His IP address is 192.168.1.64 IP of the other is 192.168.1.65.
  "I'm trying to connect to 192.168.1.64 via SQL more 192.168.1.66 by running the following command: sqlplus system@"192.168.1.64/orcl.168.1.100 "and receive this error message:" ORA-12170: TNS: Connect timeout occurred. " I thought it was the default Windows Firewall that has caused this and changed the windows firewall settings in 192.168.1.64 adding port 1521 in the list of windows firewall. Now, I get this error: "ORA-12541: listener TNS:no.»

  Published by: totalnewby on June 12, 2010 10:53

  =================================

  Suppose you have the following in your tnsnames.ora:

  Larry =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST = myhost) (PORT = 1521))
  )
  (CONNECT_DATA =
  (SERVICE_NAME = curley)
  )
  )

  Now, when you issue a connect, say like this:

  $> sqlplus scott/tiger@larry

  TNS will appear in your tnsnames.ora for an entry called "larry". Then, tns sends a request to (PORT = 1521) on (HOST = myhost) to aid (PROTOCOL = TCP), requesting a connection to (SERVICE_NAME = curley).

  Where's (HOST = myhost) on the network? When the request is passed to tns to the next layer in the network stack, the name "myhost" resolves to an IP address, either via a file 'hosts' local, through DNS, or possibly other mechanisms being used less. Alternatively, you can hard-code the IP (HOST = 123.456.789.101) in the tnsnames.ora.

  Then, the request arrives at port 1521 myhost. If all goes well, there is a listener on myhost configured to listen on port 1521, and this listener knows SERVICE_NAME = curley. If so, you'll be connected.

  A few important points.

  First, the listener is a process only the side server. It's all in life seeks applications for reception for connections to the databases and set up these connections. Once the connection is established, the listener is out of the picture. It creates the connection. It does not support the connection. A listener, linking an oracle of the House, listening on a single port, use multiple instances of database in several versions of several houses. It is unnecessary complexity to try to have several headphones. It's like the telephone company, to build a separate table for each customer.

  Secondly, the tnsnames.ora file is a client-side problem. Its purpose is to address resolution - the equivalent of the 'hosts' file tns further to the bottom of the network stack. The only reason it exists on a host computer is because this machine also can run client processes.

  What can go wrong?

  First, there may not be an entry for 'larry' in your tnsnames file. In this case, you get "ORA-12154: TNS: could not resolve the connect identifier specified" no need to go looking for a problem on the host, with the listener, etc.. If you cannot place a phone call because you do not know the number (cannot find your phonebook (tnsnames.ora) or can not find the party looking for listed in it (no entry for larry)) you don't look at problems at the switchboard.

  Perhaps the entry for larry was found, but myhost could not be resolved to an IP address (for example there is no entry for myhost in the local hosts file). This will mean by "ORA-12545: Connect failed because target host or object does not exist.

  Maybe there is an entry for MyServer in the local hosts file, but it specified a bad IP address. This will mean by "ORA-12545: Connect failed because target host or object does not exist.

  Maybe the INVESTIGATION period was good, but there is no listener running: "ORA-12541: TNS:no listener.

  Maybe the INVESTIGATION period was good, there is a listener to myhost, but he is listening on a different port. "ORA-12560: TNS:protocol adapter error.

  Maybe the INVESTIGATION period was good, there is a listener to myhost, listening on the specified port, it's unknown SERVICE_NAME = curley. "ORA-12514: TNS:listener is not currently of service requested in connect descriptor.

  =====================================

• SQL * more syntax to connect to Apex 3.1 workspace

  How to connect to a particular application of workspace Apex using SQL * MORE?
  
  In the tenth Summit, Sql * more command is: "sqlplus username/password" to connect and connect to the base.
  
  However, at the Apex 3.1 "sqlplus username/password" is no longer the correct syntax to connect and connect to the database is created in the workspace Apex.
  
  I created a table called "Sample" in the workspace Apex. I can run the sql query on the "Sample" in the GUI Apex SQL Workshop table. Type "sample to describe" workspace for SQL workshop gives me the desired result.
  
  However, when I come out to the command prompt and use sqlplus to issue "sample", I get "table or view does not exist.
  
  Is there any documentation on how to use SQL * PLUS to connect to the tables created in the workspace Apex?
  
  TIA

  1. If no database not created in a workspace

  2. There are schemas attached to a workspace (or created by it)

  3. you must connect to sql more like this:

  C:\Users\Denes Kubicek>sqlplus
  
  SQL*Plus: Release 10.2.0.1.0 - Production on Di Okt 14 22:19:28 2008
  
  Copyright (c) 1982, 2005, Oracle.  All rights reserved.
  
  Benutzernamen eingeben: dkubicek@xe
  Kennwort eingeben:
  
  Verbunden mit:
  Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production
  
  SQL> desc emp;
   Name                                      Null?    Typ
   ----------------------------------------- -------- -----------------
  
   EMPNO                                     NOT NULL NUMBER(4)
   ENAME                                              VARCHAR2(10)
   JOB                                                VARCHAR2(9)
   MGR                                                NUMBER(4)
   HIREDATE                                           DATE
   SAL                                                NUMBER(7,2)
   COMM                                               NUMBER(7,2)
   DEPTNO                                             NUMBER(2)
  
  SQL>
  

  This has nothing to do with the apex.

  I would say, your workspace has several patterns that are entrusted to him. You were probably asking a particular schema and he gave you the correct results. In SQL more trying to describe a table that is not there.

  This should give you some results:

  SELECT object_name, object_type
    FROM all_objects
   WHERE owner = 'DKUBICEK';
  

  where you replace "DKUBICEK" with the name of schema, you log into SQL Plus.

  To see the schema that you use for SQL Workshop / SQL commands, see the dropdown in the top right corner - schema.

  Denes Kubicek
  -------------------------------------------------------------------
  http://deneskubicek.blogspot.com/
  http://www.Opal-consulting.de/training
  http://Apex.Oracle.com/pls/OTN/f?p=31517:1
  -------------------------------------------------------------------

• Can I connect to SQL * more as SYS after connecting as a user and then run a GRANT?

  Oracle 11 g 2

  Linux RHEL 6.3

  SQL * Plus 11.2.0.2 on Windows 7

  ------------------------------------------------

  I am running a script SQL through SQL * more connected as "DOE, JOHN".

  In the SQL script, I need to connect as SYS to make a GRANT EXECUTE on a SYS package (e.g. GRANT EXECUTE ON DBMS_CRYPTO to JOHN;).

  But it fails with the following error:

  
  GRANT EXECUTE ON TO JOHN DBMS_CRYPTO
  *
  ERROR on line 1:
  ORA-01917: user or role 'JOHN' does not exist

  But of course, 'JOHN' are.  The rest of the SQL script is running "DOE, JOHN" without any problem.

  The code segment of SQL script in question is:

  connect sys/password as sysdba
  GRANT EXECUTE ON DBMS_CRYPTO TO ROYSECITYDATA;  <-fails here
  to connect/DOE

  Please advise on what my being the issue.

  tx103108 wrote:

  I connect to a remote database.  All dbs distance have the same instance name as they are all images.  I see where you're going (I think).  Should I try

  I'll try to connect sys/password@MYDB

  Sounds like a plan... (the instance_name returned with what you expected? or something else?)

• Connection with SQL * more is not possible

  Hello together,

  I have a problem with my database and SQL Plus.

  I can't connect to my DB via SQL Plus, I get the error message: > > ORA_12546: TNS: detonation verweigert (Permission denied) < <.

  I tried it with several users. When I try to log in to enterprise manager or connecting to the DB through SQL Developer works very well with the user > > sys < <, only the SQL more connection does not work.

  It works until yesterday that there are some problems with the DB and the processor and RAM were almost 100% occupied each.

  
  

  We use the Version 11 g Enterprise Edition Release 11.2.0.1.0 64 bit Production on a Windows Server 2008 R2 Enterprise Server.

  I am running SQL Plus, Enterprise Manager and SQL Developer directly on the DB server.

  When I start SQL Plus he asks me my username > > enter user name: < < and after that my password: > > password: < <.

  A connection as seen in many forums or document on the internet like > > scott/tiger@ORCL < < never worked on my system, which is also confused me.
  

  
  

  We have no listener.ora file in the folder: ORACLE_HOME/NETWORK/ADMIN only a sqlnet.ora with line > > SQLNET. AUTHENTICATION_SERVICES = (NTS) < < in it.
  

  
  

  
  

  Status of the listener:

  ---------------------------------------------------------------------------------------------------------------------------------------------------------
  

  C:\Windows\System32 > lsnrctl status

  LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 18 February 2014 12:14:32

  Copyright (c) 1991, 2010, Oracle.  All rights reserved.

  Connection to (ADDRESS = (PROTOCOL = tcp)(HOST=) (PORT = 1521))

  STATUS of the LISTENER

  ------------------------

  Alias LISTENER

  TNSLSNR for Windows 64-bit version: Version 11.2.0.1.0 - Production

  Start date February 18, 2014 10:15:54

  Uptime 0 days 1 hour 58 minutes 42 seconds

  Draw level off

  Security ON: OS Local Authentication

  SNMP OFF

  O:\app\administrator\diag\tnslsnr\QualisysDbNbg\listener\alert\log.XML log listener

  Summary of endpoints listening...

  (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp)(HOST=QualisysDbNbg) (PORT = 1521)))

  Summary of services...

  Service "orcl" has 1 instance (s).

  Instance "orcl", State LOAN, has 1 operation for this service...

  The command completed successfully

  C:\Windows\System32 >

  ---------------------------------------------------------------------------------------------------------------------------------------------------------

  
  

  I hope someone can help me with this problem.

  
  

  Thank you you very much in forward for your answerand greetings

  Matthias
  

  
  

  The sys user must connect as sysdba

  have you tried

  sqlplus 'sys@ORCL as sysdba'

  or

  sqlplus 'sys/yoursyspwd@ORCL as sysdba'

  the first command should work without password for all users group ORA_DBA.

  Scott, the user cannot also exists in your database.

• Unable to connect to the database using SQL * more

  Hi, I have Oracle 10 g XE installed in my labtop, and I can't connect using SQL * more.
  I can connect using the User Interface of navig however, I could do after the following procedure to change the password for the sys account:
  -Open a command prompt
  -type sqlplus
  -On the line "Enter user name", enter the sysdba virtue
  -On the SQL > prompt, type alter user sys identified by NewPassword;
  
  But the thing is that even if I am able to connect using sys/NewPassword from my browser UI, I don't get the same result when do this using the SQL prompt.
  
  What I try to do is the following:
  SQL > connect sys/NewPassword
  Can I get first a warming of the planet by saying I should use sysdba or sysoper to connect to the system account, but none of those who work.
  
  Can anyone advice me on this subject?
  
  Thanks in advance

  Does make sense at all?

  You really need to Read The Fine Manual
  http://download.Oracle.com/docs/CD/E11882_01/server.112/e16508/TOC.htm

  When you log in as USER "SYS" DB must be described as 'AS SYSDBA'

  sqlplus
  / as sysdba
  SHOW USER;
  -line above indicates that you are now connected to the DB as "SYS"!

  SQL > CONNECT SYS / AS SYSDBA

• bad connect to Sql * more via command and cannot log on to the designer (need for connection string)

  I installed Oracle Developer with success, but having bad connect to Sql more than command line, also unable to connect via the developer tools, I get a TNS: Connect timeout occurred. This happens also for the "Plus" Sql for Windows.

  

  
  

  However, I can connect via the Sql Plus command window when it is executed from "Start-> all programs", but not when I first run the command window:

  

  
  

  I have a good Oracle 11 g install on Windows 7 and a good developer Sql install so I can connect to databases, but something does not work when you try to connect through these tools. Although Sql Plus works when called from 'Start-> all programs'
  

  sqlplus scott/tiger - don't use SQL * Net, you can connect like this even with the listener is stopped.

  Developer SQL can ONLY connect using SQL * Net & can be blocked by the firewall

  to connect using sqlplus & SQL * Net, you need to invoke it as below

  sqlplus scott/tiger@orcl

• How to validate SQL * MORE connection in Unix shell script

  I wrote the following function in unix shell script to validate SQL * MORE connection and throw a user-defined message.

  function check_db_conn

  {

  output | sqlplus-s-L $User/$Password@$SID >/dev/null

  If [[$?-no 0]]; then

  echo 'credentials incorrect DB.

  FI

  }

  However, I would like to change this feature so that the user has entered a good connection and that there is a problem with TNS listener must display the appropriate message.

  Hello

  Try adding:

  lsnrctl status $listener_name > /dev/null
  if [[ $? -ne 0 ]]; then
    echo "Issue with Listener"
  fi
  

• Connection to the 11g on Oracle_Developer_Days.ova with sql + more

  I downloaded the Oracle_Developer_Days.ova and have confirmed with connectivity

  C:\Users\robm > ping ServeurOracle

  ServeurOracle ping [192.168.11.18] with 32 bytes of data:

  Reply from 192.168.11.18: bytes = 32 time < 1 ms TTL = 64

  Reply from 192.168.11.18: bytes = 32 time < 1 ms TTL = 64

  Reply from 192.168.11.18: bytes = 32 time < 1 ms TTL = 64

  Reply from 192.168.11.18: bytes = 32 time < 1 ms TTL = 64

  Ping statistics for 192.168.11.18:

  Packets: Sent = 4, received = 4, lost = 0 (0% loss),

  Time approximate round trip in milli-seconds:

  Minimum = 0ms, Maximum = 0ms, average = 0ms

  C:\Users\robm >

  I have advanced and installed the client instant and also installed the sql + more

  C:\Users\robm > sqlplus scott/tiger@orcl

  SQL * more: Production of the 12.1.0.1.0 on sat Nov 30 00:27:44 version 2013

  Copyright (c) 1982, 2013, Oracle.  All rights reserved.

  ERROR:

  ORA-12514: TNS:listener is not currently of service requested in connect

  descriptor of

  Enter the user name:

  Here the tnsnames.ora can, I did you see errors?

  XRACQ_MYSERVICE_TAF =

  (DESCRIPTION =

  (ADDRESS = (PROTOCOL = TCP)(HOST = oracleserver) (PORT = 1521))

  (LOAD_BALANCE = yes)

  (CONNECT_DATA =

  (SERVER = DEDICATED)

  (SERVICE_NAME = orcl)

  (FAILOVER_MODE =

  (TYPE = SELECT)

  (METHOD = BASIC)

  (RETRIES = 180)

  (DELAY = 5)

  )

  )

  )

  any ideas on how to make it work?

  I now get

  ORA-01017: name of user and password invalid. connection refused

  using tsnames.ora

  WEIRD =.

  (DESCRIPTION =

  (ADDRESS_LIST =

  (ADRESSE = (PROTOCOL = TCP) (HOST = 192.168.11.18)(PORT = 1521)))

  (CONNECT_DATA =

  (SERVICE_NAME = orcl)

  )

  )

  so I seem to connect now... . How can scott Tiger be wrong isn't the default?

• Connect to the database with SQL * more: is TNSNAMES. ORA used?

  Hello

  We have a local database called DEV01 and a copy of this database in a data center. To be able to connect to both databases, the TNSNAMES file. ORA

  on the local database server (not the one in the data center) has the following entries:

  / * Entry for the local database * /.

  DEV01_local, DEV01_local. WORLD =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST = server01) (PORT = 1521))
  )
  (CONNECT_DATA =
  (SERVER = DEDICATED)
  (SID = DEV01)
  )
  )

  / * Entry for the database in the data center * /.

  DEV01, DEV01. WORLD =
  (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = TCP)(HOST = server02) (PORT = 1521))
  )
  (CONNECT_DATA =
  (SERVER = DEDICATED)
  (SID = DEV01)
  )
  )

  When I connect to the local database server, I set the Oracle environment as follows:

  export ORACLE_SID = DEV01

  export PATH=/opt/oracle/app/oracle/product/9.2.0/bin:$PATH

  export ORACLE_HOME=/opt/oracle/app/oracle/product/9.2.0

  Now I start SQL * more as follows:

  Oracle # > sqlplus user/user

  SQL > select instance_name, host_name from v$ instance;

  INSTANCE_NAME HOST_NAME

  ---------------- ----------------------------------------------------------------

  SERVER01 DEV01

  As the SID is on two databases of the same (DEV01) I really don't understand how Oracle decides which of the SQL databases * more connects to.

  Is it the entry in the TNSNAMES file. ORA?

  But when I start SQL * more as follows:

  Oracle # > sqlplus user/user@DEV01_local

  SQL > select instance_name, host_name from v$ instance;

  INSTANCE_NAME HOST_NAME

  ---------------- ----------------------------------------------------------------

  SERVER01 DEV01

  or

  Oracle # > sqlplus user/user@DEV01

  SQL > select instance_name, host_name from v$ instance;

  INSTANCE_NAME HOST_NAME

  ---------------- ----------------------------------------------------------------

  DEV01 server02

  everything is as expected.

  Does anyone know who is the chosen database when just to connect with 'sqlplus user/user' (without the @DEV01 or @DEV01_local)?

  Any help will be appreciated!

  Rgds

  Jan

  When you connect to the local database that is connected to the server01, you need only specify the sid in the environment, in this case, Oracle tnsnames file to connect, actually uses, it uses any of the listener.  It uses what is called a connection needed.  It is purely a side connection server, and as long as the sid is located in the environment resolves to a database running on that server, you will be get connected.

  When you connect using the @connect_descriptor, like you second case, then Oracle will use the configured naming, including tnsnames, methods to solve the 'real' database  In this case, the auditor is required to create the connection to the database.

  John

• How to get SQL * more to connect to my database of Apex?

  How can I get SQL * more to connect to my database of Apex? By using the username and password I use to connect to Apex does not (ORA-01017). What should I do to connect to my db Apex?
  
  Thank you
  Kim

  Connection string is "connect username/password@database".

  The analysis schema is a database account, that's why you can log on to SQL * more like that.

  This allows to get the database name

  select instance_name from v$instance;
  

  And if you forgot the password for the PT

  alter user PT identified by 'your_new_password';
  

  Scott

• My - Sql Remote Connection DW CS3

  This may seem like a silly question, I apologize in advance.

  I created a database on my local copy of mysql (wamp). I have created a successful database connection in dreamweaver as I was testing my site on my local test php/msql server.

  I am now testing it on my ftp server remote and have no idea how I would create a database of remote connection. When I put locahost in mysql server field in the control panel link, that I can no longer access my database because it is local and I work remotely.

  My question is how do I create a remote mysql database, and how do I transfer my local databases (direct test server) remotely and, possibly, for publication on the web?

  How to create a remote database is something that you will need to know if your hosting company. Some companies create the user account and the database for you. Other companies allow you to set up your own databases and user accounts via the host control panel.

  Once you have a remote database, you transfer your local database by exporting the data and table structure to a .sql file. Then use this .sql file to import the data in the remote database. You can do that with phpMyAdmin. Use the tab export on your local version of phpMyAdmin, select the option to save the data in a file. Once you have exported the data, go to the version of your host of phpMyAdmin, select the import tab navigate to the .sql file that you have already saved and import the data. You can also use Navicat or other MySQL front-end programs to make the transfer for you.

• Unable to connect to an instance by using EM but properly connect with SQL * more

  Hello
  
  I followed the following steps (from the document s/n 2 days):
  
  1. I created a model (including the database) to an instance named "orcl" using DBCA, before we proceed to create the model, DBCA informed me that the Forum might be stopped, I told him to go ahead.
  
  2. the model has been successfully created.
  
  3. I am now unable to connect to the instance orcl using EM, but I can connect to this instance without any problem using SQL * more.
  
  Question: Why am I not able to connect to the instance by using EM? and what should I do to fix this?
  
  Thank you very much for your help,
  
  John.
  
  PS: in case it may be useful, the listener tnsnames and Sqlnet files follow:
  

  # listener.ora Network Configuration File: E:\Oracle\product\11.2.0\dbhome_1\network\admin\listener.ora
  # Generated by Oracle configuration tools.
  
  SID_LIST_LISTENER =
    (SID_LIST =
      (SID_DESC =
        (SID_NAME = CLRExtProc)
        (ORACLE_HOME = E:\Oracle\product\11.2.0\dbhome_1)
        (PROGRAM = extproc)
        (ENVS = "EXTPROC_DLLS=ONLY:E:\Oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
      )
    )
  
  LISTENER =
    (DESCRIPTION_LIST =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
        (ADDRESS = (PROTOCOL = TCP)(HOST = ORACLE2DAY1)(PORT = 1521))
      )
    )
  
  ADR_BASE_LISTENER = E:\Oracle

  # tnsnames.ora Network Configuration File: E:\Oracle\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
  # Generated by Oracle configuration tools.
  
  DBCA =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = ORACLE2DAY1)(PORT = 1521))
      (CONNECT_DATA =
        (SERVER = DEDICATED)
        (SERVICE_NAME = dbca.localsite.com)
      )
    )
  
  ORACLR_CONNECTION_DATA =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      )
      (CONNECT_DATA =
        (SID = CLRExtProc)
        (PRESENTATION = RO)
      )
    )
  
  LISTENER_ORCL =
    (ADDRESS = (PROTOCOL = TCP)(HOST = ORACLE2DAY1)(PORT = 1521))
  
  
  ORCL =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = ORACLE2DAY1)(PORT = 1521))
      (CONNECT_DATA =
        (SERVER = DEDICATED)
        (SERVICE_NAME = orcl.localsite.com)
      )
    )

  # sqlnet.ora Network Configuration File: E:\Oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
  # Generated by Oracle configuration tools.
  
  # This file is actually generated by netca. But if customers choose to 
  # install "Software Only", this file wont exist and without the native 
  # authentication, they will not be able to connect to the database on NT.
  
  SQLNET.AUTHENTICATION_SERVICES= (NTS)
  
  NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

  I think you change some configuration of your system as domain/IP address/host name.
  You need

  set ORACLE_SID=orcl
  emca -deconfig dbcontrol db -repos drop
  emca -config dbcontrol db -repos create
  

  then after result

• Database demo of vision: how to access the database through SQL * more?

  I'm totally new in this space, so forgive my beginner questions.

  What I want to do, is to integrate EBS with APEX. To get there I downloaded (of delivery) and installed the Vision database unique node in a VirtualBox. To do this, I followed this video on YouTube: https://www.youtube.com/watch?v=8JgxMDPsd6s

  Now I want to install APEX and for this I need to access my database as SYS. Now for my questions:

  1. How can I use SQL * more in the VirtualBox?

  2. What is the default password for SYS with this demo database?

  Thanks, Alex

  File under $ORACLE_HOME and the owner is the user 'oracle '.

  You will need to source the file VISION_ebs.env , and then deliver "env | fate"and you should see the set env variables. You can connect as sysdba.

  Thank you

  Hussein

• Remote connection to a database

  Hi all

  I work with databases oracle 2 years. So far, I'm assuming that you want to connect to an oracle database that is located in a remote location, you must first install oracle in our

  local PC, if not the full version, but at least a version of the client must be installed. And then, you'll have a file in your disk that contains a folder of oracle in which you'll have a file called

  tnsnames.ora. so, once that if you are able to make the entrance to the entrance of the database which is in a remote location, then you can connect to any number of databases that are installed

  in the network using sql * more like below.

  user_name/password@dblink

  We connect directly to the db, and the basic requirement is that the listner oracle service should run.

  But with SQL Developer, I am able to connect to oracle db without install oracle in my local pc, with not even the version of the client installed.

  So far, my assumption is without the listener running service in our local pc, that we are unable to connect to a remote database.

  How the sql developer is able to connect to remote db without the listening service.

  Maybe it's not a technical question related to any topic in the database, but I have some friends in my current organization I joined recently.

  Thanks in advance.

  Kind regards

  Raju.

  You do not have a listener on your local PC it is running on the server and listen for requests for connecting customers.

  Developer SQL uses JDBC to connect to a server and does not need the installed Oracle client or TNS names file.