Connecting to 9i Lite DBMS via SQL*Plus?

Finally got the install to run successfully. However, I can't make an ODBC connection to the database with SQL*Plus. Any ideas (other than going back to 8i Lite)?

Have you created a User Data Source to your Oracle Lite database throught the Microsoft ODBC Administrator? If so, then through sql*plus- you should be able to test connectivity.
Goto a dos command window and type sqlplus system/manager@odbc:your_database_name;
Where your_database_name is the name of the OBDC Data Source name that you have created.
Hope this helps.
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Similar Messages

Connect via SQL*Plus taking more time in Oracle 11 than in 10

Oracle Version
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Productioncurrently migrating from
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Productio
NLSRTL Version 10.2.0.4.0 - ProductionOS is AIX 5.3 for Oracle 10 and AIX 6.1 for Oracle 11.
We are currently in the process of migrating some applications from Oracle 10 to 11. Our admins have setup a new development system for us with an Oracle 11 instance. Regarding performance the new system behaves more or less the same than our old, e.g. when executing SQLs we notice hardly any performance differences and those we find are slightly in favour of the new system.
But now we discovered that the time it takes to establish a database connection via SQL*Plus is longer on the Oracle 11 system. Running the following code
sqlplus -s user/pw@database <<END
quit
ENDa thousand times takes ~60s under Oracle 10 but ~140s under Oracle 11. This may not seem much but we are running a test framework consisting of a bunch of shell scripts where several thousand connections are openend via SQL*Plus to execute some SQLs, so that even this small time difference results in rather huge difference in total runtime. The SQLs themself require roughly the same time in both databases, as already mentioned above they are in fact slightly faster in Oracle 11.
To analyze the time difference I ran a trace for the connect with the following parameters in sqlnet.ora
TRACE_LEVEL_CLIENT=4
TRACE_UNIQUE_CLIENT=ONand found out that there is a time difference of about 70ms during the connect handshake:
Oracle 10
[22-MAR-2013 12:13:09:595] nscon: doing connect handshake...
[22-MAR-2013 12:13:09:595] nscon: sending NSPTCN packet
[22-MAR-2013 12:13:09:621] nscon: got NSPTRS packet
[22-MAR-2013 12:13:09:621] nscon: sending NSPTCN packetOracle 11
(1) [22-MAR-2013 12:15:26:812] nscon: doing connect handshake...
(1) [22-MAR-2013 12:15:26:812] nscon: sending NSPTCN packet
(1) [22-MAR-2013 12:15:26:906] nscon: got NSPTRS packet
(1) [22-MAR-2013 12:15:26:906] nscon: sending NSPTCN packetUnder Oracle 10 there are 26ms between sending the NSPTCN packet and getting the NSPTRS packet, whereas under Oracle 11 this takes 94ms. I ran the trace again, this time with
TRACE_LEVEL_CLIENT=16and got the following results for the critical interval:
Oracle 10:
[22-MAR-2013 13:17:37:638] nscon: sending NSPTCN packet
[22-MAR-2013 13:17:37:638] nspsend: entry
[22-MAR-2013 13:17:37:638] nspsend: plen=218, type=1
[22-MAR-2013 13:17:37:638] nttwr: entry
[22-MAR-2013 13:17:37:638] nttwr: socket 9 had bytes written=218
[22-MAR-2013 13:17:37:638] nttwr: exit
[22-MAR-2013 13:17:37:638] nspsend: packet dump
<<packet dump removed>>
[22-MAR-2013 13:17:37:638] nspsend: 218 bytes to transport
[22-MAR-2013 13:17:37:638] nspsend: normal exit
[22-MAR-2013 13:17:37:638] nscon: exit (0)
[22-MAR-2013 13:17:37:638] nsdo: nsctxrnk=0
[22-MAR-2013 13:17:37:638] nsdo: normal exit
[22-MAR-2013 13:17:37:638] nsdo: entry
[22-MAR-2013 13:17:37:638] nsdo: cid=0, opcode=68, *bl=512, *what=9, uflgs=0x0, cflgs=0x3
[22-MAR-2013 13:17:37:638] nsdo: rank=64, nsctxrnk=0
[22-MAR-2013 13:17:37:638] nsdo: nsctx: state=2, flg=0x4005, mvd=0
[22-MAR-2013 13:17:37:638] nsdo: gtn=10, gtc=10, ptn=10, ptc=2011
[22-MAR-2013 13:17:37:638] nscon: entry
[22-MAR-2013 13:17:37:638] nscon: recving a packet
[22-MAR-2013 13:17:37:638] nsprecv: entry
[22-MAR-2013 13:17:37:638] nsprecv: reading from transport...
[22-MAR-2013 13:17:37:638] nttrd: entry
[22-MAR-2013 13:17:37:665] nttrd: socket 9 had bytes read=8
[22-MAR-2013 13:17:37:665] nttrd: exit
[22-MAR-2013 13:17:37:665] nsprecv: 8 bytes from transport
[22-MAR-2013 13:17:37:665] nsprecv: tlen=8, plen=8, type=11
[22-MAR-2013 13:17:37:665] nsprecv: packet dump
[22-MAR-2013 13:17:37:665] nsprecv: 00 08 00 00 0B 00 00 00 |........|
[22-MAR-2013 13:17:37:665] nsprecv: normal exit
[22-MAR-2013 13:17:37:665] nscon: got NSPTRS packetOracle 11
(1) [22-MAR-2013 13:33:40:504] nscon: sending NSPTCN packet
(1) [22-MAR-2013 13:33:40:504] nspsend: entry
(1) [22-MAR-2013 13:33:40:504] nspsend: plen=205, type=1
(1) [22-MAR-2013 13:33:40:504] nttwr: entry
(1) [22-MAR-2013 13:33:40:504] nttwr: socket 8 had bytes written=205
(1) [22-MAR-2013 13:33:40:504] nttwr: exit
(1) [22-MAR-2013 13:33:40:504] nspsend: packet dump
<<packet dump removed>>
(1) [22-MAR-2013 13:33:40:505] nspsend: 205 bytes to transport
(1) [22-MAR-2013 13:33:40:505] nspsend: normal exit
(1) [22-MAR-2013 13:33:40:505] nscon: exit (0)
(1) [22-MAR-2013 13:33:40:505] snsbitts_ts: entry
(1) [22-MAR-2013 13:33:40:505] snsbitts_ts: acquired the bit
(1) [22-MAR-2013 13:33:40:505] snsbitts_ts: normal exit
(1) [22-MAR-2013 13:33:40:505] nsdo: nsctxrnk=0
(1) [22-MAR-2013 13:33:40:505] snsbitcl_ts: entry
(1) [22-MAR-2013 13:33:40:505] snsbitcl_ts: normal exit
(1) [22-MAR-2013 13:33:40:505] nsdo: normal exit
(1) [22-MAR-2013 13:33:40:505] nsdo: entry
(1) [22-MAR-2013 13:33:40:505] nsdo: cid=0, opcode=68, *bl=2048, *what=9, uflgs=0x0, cflgs=0x3
(1) [22-MAR-2013 13:33:40:505] snsbitts_ts: entry
(1) [22-MAR-2013 13:33:40:505] snsbitts_ts: acquired the bit
(1) [22-MAR-2013 13:33:40:505] snsbitts_ts: normal exit
(1) [22-MAR-2013 13:33:40:505] nsdo: rank=64, nsctxrnk=0
(1) [22-MAR-2013 13:33:40:505] snsbitcl_ts: entry
(1) [22-MAR-2013 13:33:40:505] snsbitcl_ts: normal exit
(1) [22-MAR-2013 13:33:40:505] nsdo: nsctx: state=2, flg=0x4005, mvd=0
(1) [22-MAR-2013 13:33:40:505] nsdo: gtn=10, gtc=10, ptn=10, ptc=8155
(1) [22-MAR-2013 13:33:40:505] nscon: entry
(1) [22-MAR-2013 13:33:40:505] nscon: recving a packet
(1) [22-MAR-2013 13:33:40:505] nsprecv: entry
(1) [22-MAR-2013 13:33:40:505] nsprecv: reading from transport...
(1) [22-MAR-2013 13:33:40:505] nttrd: entry
(1) [22-MAR-2013 13:33:40:618] nttrd: socket 8 had bytes read=8
(1) [22-MAR-2013 13:33:40:618] nttrd: exit
(1) [22-MAR-2013 13:33:40:618] nsprecv: 8 bytes from transport
(1) [22-MAR-2013 13:33:40:618] nsprecv: tlen=8, plen=8, type=11
(1) [22-MAR-2013 13:33:40:618] nsprecv: packet dump
(1) [22-MAR-2013 13:33:40:618] nsprecv: 00 08 00 00 0B 00 00 00 |........|
(1) [22-MAR-2013 13:33:40:618] nsprecv: normal exit
(1) [22-MAR-2013 13:33:40:618] nscon: got NSPTRS packetAny ideas what could be the reason for this time difference? Something in our network configuration or something else?

With local connections - I do not think a TCP packet send from an IP to the same IP, leaves the interface as an actual wire protocol/signal. If I'm correct, then running local connection tests will be mostly useless in checking the actual network infrastructure.
Tests 3 and 4 should be showing the same connection times as the same physical network infrastructure is used - only the direction is reversed in the tests.
I would assume that port settings on the switches and interface settings on the routers treat packets equally in both directions between 2 servers. But this could in part explain the problem if this is not the case. In a case of a router for example, the 1st test's ingress interface is the egress interface of the 2nd test (and vice versa). Configurations can differ substantially between interfaces on the same router. Likewise if there is a firewall - as different rule sets are applied in each test and these rule sets could differ.
So I would not be too quick to state that this is definitely not a network problem. But I agree that based on the small percentage difference (assuming comparable tests), it does not look like a network issue.
The next step is to determine what the delay is between the listener accepting the client connection, and the connection being serviced by a dedicated server process.
This will require listener tracing - tracing the time from when the listener accepted the connection (and parsed the TNS connection string), to handing off the connection to the dedicated server process.
As a comparison test, you can also test shared server connections. Dispatcher processes (of the db instance) register themselves with the listener. The shared server client hand off is thus done to an existing server process - no need for the Listener to make a kernel call to load and initialise an executable image.
Shared connections are typically faster than dedicated connections in this respect.
If there is a major time difference, then it means some kind of issue with the listener dealing with dedicated servers as oppose to dispatcher hand off's. As both connections would have had very similar network transit time - which means the connection time difference is related directly to dealing with a dedicated server connection request and hand off.
You can also substitute the oracle executable with a wrapper - and troubleshoot the actual dedicated server startup. I've only done this with Oracle XE 10.2 though and with local IPC connections. Unsure how robust this will be for testing purposes via TCP using 11g.

Connection Via SQL*Plus Worksheet

Dear Friends,
I have a peculiar problem. I am connecting via 9i client to a oracle 8i server.
I could manage to access the database via 9i client's EM and SQL scratch pad. But I am unable to connect via SQL*plus worksheet.
I got this error
ERROR:
ORA-12154: TNS:could not resolve service name
While I test the service name via Oracle Net manager, it is successful.
Anybody could shed some light.
Regards
Kumar

Enterprise Manager still has SQL*Plus Worksheet. See:
http://download-west.oracle.com/docs/cd/B10501_01/em.920/a96670/ch_alone.htm#1015179
-- CJ

Making connection to Oracle 9i via SQL Plus - Mark

Hi,
I am unable to connect to oracle 9i via dos prompt or SQL Plus.
I installed the satabase on windows.
The SID is obiwan. Please help, already browsed similar topics and its not happening.
Thanks in advance.

The Listener is the process that is listening for incoming remote connections to the DB(s).
Database and Listener have Windows services, and services have to be started. Also, from DOS prompt you can do :
C:\> lsnrctl stat
to see if the Listener is active : the result should be the list of active DB(s).
To connect locally to the DB do the following :
C:\> set ORACLE_SID=obiwan
C:\> sqlplus "/ as sysdba"
The result should be something like SQL*Plus: Release 9.2.0.4.0 - Production on Dom Apr 10 16:58:32 2005
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
SQL>If the result is something like : SQL*Plus: Release 9.2.0.4.0 - Production on Dom Apr 10 17:01:29 2005
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to an idle instance.
SQL> then it means that the DB is not up. In this case try :
SQL> startup
That way you are connected as sysdba, you can startup and shutdown the DB, create users, and so on. Do not use this connection to create objects (tables, indexes and so on) :
create an user, using the command "create user" (See [url http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/toc.htm]Sql documentation), and connect as that user, for example
SQL> conn scott/tiger
or, at DOS prompt
C:\> sqlplus scott/tiger
If you create a TNS alias, as I said before, you can use that as connection string from DOS prompt
C:\> sqlplus scott/tiger@<TNS alias>
or using SqlPlus in the Oracle menu.

Lite 8i - Win98 - SQL*Plus

Why can't I connect. Can connect to Navigator,Designer lite.
OBDC test,,,just want to mess with SQL*Plus,,, that's all.
null

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Mulyadi Kurniawan ([email protected]):
Host string usually refers to the host string that is stored in your TNSNAMES.ORA file. You can open TNSNAMES.ORA with a text editor.
If you get "TNS: could not resolve service name", it's either you have not start the database or your configuration in TNSNAMES.ORA is wrong.<HR></BLOCKQUOTE>
hi,
iam getting the same error(the TNS thing)can you be a bit more explaining regarding how to solve the problem.
thanks
null

Oracle 8i Lite: logging to sql plus - uid, password, host string - whats that

If i install "Oracle 8i Lite" (just locally, not networked). There are two important things : "Navigator", and "SQL Plus". If in navigator, I create a local database called "xxx" (tables under 'system' user). Then if i need to query - i go to SQL Plus. Fine, but how do we log in - what is the "host string" ?.
The login needs, Userid, Password, Host String. In some docs, it said the userid, password for 'system' account is 'system, manager' respectively. Anyways, now the host string , i had read the 'host string' will be like "@databasename", so I think for me, it will be "@xxx"
But the way, I'm understing, i cant log, and SQL Plus says something "TNS: could not resolve service name". Maybe i have to something with that tnsnames.ora file....?
Incase, you could give ANY information, kindly inform.
Thanks
null

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Mulyadi Kurniawan ([email protected]):
Host string usually refers to the host string that is stored in your TNSNAMES.ORA file. You can open TNSNAMES.ORA with a text editor.
If you get "TNS: could not resolve service name", it's either you have not start the database or your configuration in TNSNAMES.ORA is wrong.<HR></BLOCKQUOTE>
hi,
iam getting the same error(the TNS thing)can you be a bit more explaining regarding how to solve the problem.
thanks
null

How to connect and export specific schemas in SQL plus

Hello,
Wanted to clarify on a few things.
- Can an Oracle 10g Release 10.2 client be used to connect to a oracle 10.1 database?
- Is there an option to "connect" (not refer) to a specific schema, say "SchemaA" in SQL plus in order to run a specific sql code on this schema alone?
- How can we export a specific schema as a dump file in SQL plus-what is the syntax? Assuming username=U;password = PW; Database=DB and schema = Sch
Thanks a lot.

- Can an Oracle 10g Release 10.2 client be used to connect to a oracle 10.1 database?
Yes. O10gR2 client can be used to connect all version of Oracle instance.
- Is there an option to "connect" (not refer) to a specific schema, say "SchemaA" in SQL plus in order to run a specific sql code on this schema alone?
connect ShcemaA/pwd@hoststring.
for e.g.
connect scott/tiger@oradev
conn scott/tiger@oradev
- How can we export a specific schema as a dump file in SQL plus-what is the syntax? Assuming username=U;password = PW; Database=DB and schema = Sch
Export can be done on Command promt not on SQLPLUS prompt.
try the following to know all the parameters and usage of exp command.
c:\> exp help=y
exp scott/tiger FILE=scott.dmp OWNER=scott GRANTS=y ROWS=y COMPRESS=y

Can connect to DB via SQL plus but not Toad!

I have installed: 10GR2 on D drive on XP machine, on C drive i have toad and Dev suite 6i (for connecting to old db's). Now, I can sqlplus from command line no problem, but when I try to connect through toad it says no listener, I also cannot tnsping my 10G db. Any idea's?

steve contents of Devsuite tnsnames are here: the 10G db is LOCAL
LOCAL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(HOST = weres09023)
(PORT = 1521)
(CONNECT_DATA =
(SERVICE_NAME = LOCAL)
EISPATCH =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(HOST = rmerptest)
(PORT = 2011)
(CONNECT_DATA =
(SERVICE_NAME = EISPATCH)
MKPEURT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = tcp)
(HOST = KARL)
(PORT = 1521)
(CONNECT_DATA =
(SID = MKPEURT)
MKPEUR =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = tcp)
(HOST = BARNEY)
(PORT = 1521)
(CONNECT_DATA =
(SID = MKPEUR)
UAT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = tcp)
(HOST = rmdbtest)
(PORT = 1800)
(CONNECT_DATA =
(SID = UAT)
DEV11 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = tcp)
(HOST = drerptest)
(PORT = 1700)
(CONNECT_DATA =
(SID = DEV11)
PROD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = tcp)
(HOST = rmdbprod)
(PORT = 1600)
(CONNECT_DATA =
(SID = PROD)
UPGD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = tcp)
(HOST = rmdbtest)
(PORT = 2200)
(CONNECT_DATA =
(SID = UPGD)
which net manager? the 10G home or the Devsuite home?

Proxy users - oracle 9.2 - accessing via sql plus

I may be totally off track here, but here is what I want
to do.
I have 2 schema's (schema A and schema B).
schema A has multiple objects (tables) within it.
I want to allow another user, schema B to access these objects. Can I use the Proxy User settings to do this? By going in and allowing Schema B to proxy for this user (shcema a). "ALTER user schemaA GRANT CONNECT THROUGH schemaB"
I try this and then go into sqlplus and log in as
schemaB, but I can't see any of schemaA's objects.
Am I missing somthing here?
In the past I have always assigned the proper grants to a role and assinged them to schema B as needed which works fine. However, it seemed to me if the proxy user worked the way I thought it would you could do things for an entire schema at one time instead of object by object using the grants.
Thanks
John

The command "oemapp.bat" does not yield any output at the command line. Here comes a session log:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
D:\oracle\ora92\bin>oemapp.bat
D:\oracle\ora92\bin>sqlplusw
Zugriff verweigert (= access denied)
D:\oracle\ora92\bin>dir oem*
Volume in Laufwerk D: hat keine Bezeichnung.
Volumeseriennummer: A0D5-BD0B
Verzeichnis von D:\oracle\ora92\bin
17.10.2006 11:15 4.971 oemapp.bat
26.04.2002 16:29 24.848 oemautil.exe
26.04.2002 16:29 20.752 oemevent.exe
3 Datei(en), 50.571 Bytes
0 Verzeichnis(se), 18.221.547.520 Bytes frei
D:\oracle\ora92\bin>dir sqlplus*
Volume in Laufwerk D: hat keine Bezeichnung.
Volumeseriennummer: A0D5-BD0B
Verzeichnis von D:\oracle\ora92\bin
27.04.2002 00:07 459.024 sqlplus.exe
26.04.2002 23:58 700.416 sqlplusw.exe
2 Datei(en), 1.159.440 Bytes
0 Verzeichnis(se), 18.221.547.520 Bytes frei
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
I'm glad about your immediate response!
Message was edited by:
user542934

ORA-12154 error when logging into SQL*Plus

I installed Oracle 10g (10.2.0.3.0) server on a Hyper-V virtual machine running Windows Server 2008 Enterprise as a standalone server. I did a software only install and then ran the Database Configuration Assistant to create a database. I also ran the Oracle Net Configuration Assistant to configure the Listener, Naming Methods, and Local Net Service Name. I ran the test in the Net Configuration Assistant and it was successful after I changed the login credentials to use the SYSTEM account and password. TNSPING of the net service name is successful. I can also successfully connect to the database via Enterprise Manager using the SYSTEM account and password. What I can NOT do is connect locally to the database via SQL*Plus (either through the gui or command line). I get the following error:
ERROR:
ORA-12154: TNS: Could not resolve the connect identifier specified
I've checked and double-checked the LISTENER.ORA, SQLNET.ORA, and TNSNAMES.ORA files. They all seem correct to me, especially since I used the configuration assistants to create them.
Anyone have an idea what might be wrong or what I can check next? Any help would be appreciated!
Thanks!

They all seem correct to me, especially since I used the configuration assistants to create them. Garbage In, Garbage Out.
Since Oracle throws an error, I strongly suspect you are mistaken.
Simply put, you are using something like "@REMOTE" someplace & somehow and the error indicates SQL*Net does not know to what @REMOTE refers.
How many systems are involved, names, OS version, etc?
post connection string & post contents of tnsnames.ora file.

Can SQL*Plus connect via ODBC to NON-Oracle data source?????

I am struggling to understand something. I downloaded Oracle instance client, SQL*Plus and ODBC components with the hopes of being able to connect via SQL*Plus to a non-Oracle/ODBC compliant database.
Is this possible? Or is SQL*Plus ability to connect via ODBC only to an Oracle data source??
Thanks...

sqlplus only connects to oracle. you can use the odbc driver from instant client to allow other applications to access oracle via odbc (e.g. excel). if you need to connect to non-oracle odbc database (ms-access, foxpro, etc.) you need odbc driver for those sources.
you can use sqldeveloper to connect to oracle and non-oracle databases. check otn product info for sqldeveloper for more details.

SQL Plus cannot connect (computers connected via DSL router)

Hi!
I have two computers connected locally via DSL router. One's IP is 192.168.1.64 and the other's IP is 192.168.1.65.
I try to connect to 192.168.1.64 via SQL plus from 192.168.1.66 by issuing the following command: sqlplus system@"192.168.1.64/orcl.168.1.100" and receive this error: "ORA-12170: TNS: Connect timeout occurred." I thought it was Windows default firewall that caused this and therefore changed windows' firewall settings in 192.168.1.64 by adding port 1521 into windows' firewall list. Now I receive this error: "ORA-12541: TNS:no listener."
Edited by: totalnewby on Jun 12, 2010 10:53 AM

totalnewby wrote:
Hi!
I have two computers connected locally via DSL router. One's IP is 192.168.1.64 and the other's IP is 192.168.1.65.
I try to connect to 192.168.1.64 via SQL plus from 192.168.1.66 by issuing the following command: sqlplus system@"192.168.1.64/orcl.168.1.100" and receive this error: "ORA-12170: TNS: Connect timeout occurred." I thought it was Windows default firewall that caused this and therefore changed windows' firewall settings in 192.168.1.64 by adding port 1521 into windows' firewall list. Now I receive this error: "ORA-12541: TNS:no listener."
Edited by: totalnewby on Jun 12, 2010 10:53 AM=================================
Assume 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 look in your tnsnames.ora for an entry called 'larry'. Next, tns sends a request to (PORT = 1521) on (HOST = myhost) using (PROTOCOL = TCP), asking for a connection to (SERVICE_NAME = curley).
Where is (HOST = myhost) on the network? When the request gets passed from tns to the next layer in the network stack, the name 'myhost' will get resolved to an IP address, either via a local 'hosts' file, via DNS, or possibly other less used mechanisms. You can also hard-code the ip address (HOST = 123.456.789.101) in the tnsnames.ora.
Next, the request arrives at port 1521 on myhost. Hopefully, there is a listener on myhost configured to listen on port 1521, and that listener knows about SERVICE_NAME = curley. If so, you'll be connected.
A couple of important points.
First, the listener is a server side only process. It's entire purpose in life is the receive requests for connections to databases and set up those connections. Once the connection is established, the listener is out of the picture. It creates the connection. It doesn't sustain the connection. One listener, running from one oracle home, listening on a single port, will serve multiple database instances of multiple versions running from multiple homes. It is an unnecessary complexity to try to have multiple listeners. That would be like the telephone company building a separate switchboard for each customer.
Second, the tnsnames.ora file is a client side issue. It's purpose is for address resolution - the tns equivalent of the 'hosts' file further down the network stack. The only reason it exists on a host machine is because that machine can also run client processes.
What can go wrong?
First, there may not be an entry for 'larry' in your tnsnames. In that 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 can't place a telephone call because you don't know the number (can't find your telephone directory (tnsnames.ora) or can't find the party you are looking for listed in it (no entry for larry)) you don't look for problems at the telephone switchboard.
Maybe the entry for larry was found, but myhost couldn't be resolved to an IP address (say there was no entry for myhost in the local hosts file). This will result in "ORA-12545: Connect failed because target host or object does not exist"
Maybe there was an entry for myserver in the local hosts file, but it specified a bad IP address. This will result in "ORA-12545: Connect failed because target host or object does not exist"
Maybe the IP was good, but there is no listener running: "ORA-12541: TNS:no listener"
Maybe the IP was good, there is a listener at myhost, but it is listening on a different port. "ORA-12560: TNS:protocol adapter error"
Maybe the IP was good, there is a listener at myhost, it is listening on the specified port, but doesn't know about SERVICE_NAME = curley. "ORA-12514: TNS:listener does not currently know of service requested in connect descriptor"
=====================================

Connecting SQL Plus to 10g XE

Hi,
I have Oracle 10g XE and Oracle Dev Suite installed on my computer. I want to connect to 10g XE via SQL Plus or from within Forms Builder but I don't know what to specify for Host String (in SQL Plus) or Database (in Forms Builder). "XE" doesn't work. Any ideas what should I put in for those params?
Thanks in advance,
Behi

First you must make sure that your tnsnames.ora is configured correctly in 10g Devsuite (Forms)
to do this you either configure it manually or use the Net Configuration Assistant found under
All Programs<devsuit_home>/configuration and migration tools/Net Configuration Assistant.
For manual configuration open the tnsnames.ora found under directory
%oraclehome%/network/admin/tnsnames.ora
and add a connection descriptor and save the file. remeber to take a backup copy.
your file should look something like this.
XE =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
)Regards,
Tony

SQL Developer Seems to have messed up SQL Plus & Crystal Connectivity

Hi all,
previously I have been able to connect to a DB via SQL Plus. Also, I have been able to report on it with Crystal Reports XI.
I'm not certain, but I believe this has occurred since installing SQL Developer?!?!? Since once I installed, no need to use SQL Plus anymore and just haven't needed Crystal for a while.
My TNSNames.ora in C:\oracle\product\10.2.0\client_1\NETWORK\ADMIN seems fine (it worked before)
SQLNet.ora has the following in it......
#SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= ( TNSNAMES, EZCONNECT )
A TNSPing returns.....
C:\>TNSPING PVNGDEV1
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 09-SEP-2
008 17:28:21
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
C:\oracle\product\10.2.0\client_1\network\admin\sqlnet.ora
TNS-03505: Failed to resolve name
C:\>
When I try and create a connection via Crystal I get....
Crystal Reports
Failed to open the connection.
Details: ORA-12154: TNS:could not resolve the connect identifier specified
[Database Vendor Code: 12154 ]
This is sending me absolutely crazy and have already spent 1/2 day trying to fix it.
Please - any ideas?
Regards
DC
SQL Developer 1.5.1
Oracle Client 10.2
Crystal Developer XI

PROBLEM SOLVED - WHAT A MYSTERY and a WASTE OF MY TIME.
APOLOGIES TO SQL Develoepr for being the prime suspect - I still love you!
TNSNAmes.ORA as follows works!!!!!!
pvngdev1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = ********)(PORT = 1521))
(CONNECT_DATA =
(SID = pvngdev1)
However, the following does not
PVODB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *******)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = PVODB)
PVOQA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *******)(PORT = 1521))
(CONNECT_DATA =
(SID = PVOQA)
# - Enterprise Reporting
ERSDEVDB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *******)(PORT = 1521))
(CONNECT_DATA =
(SID = sasrpt)
(SERVER = DEDICATED)
# - PVNG
PVNGDEV1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *******)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = PVNGDEV1)
PVNGQA1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *******)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = PVNGQA1)
DESTDEV1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = *******)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = DESTDEV1)
Why is this.
I guess I 'll build up TNSNAmes connection by connectuion and test and see how I get on.
Regards all
DC

When connecting to database in SQL* plus giving Error

hi,
I am using Oracle 10g. My problem is when i connecting to database in Server through SQL * Plus giving the Error:
ORA-12514: TNS:listerner does not currently know of service requested in connect descriptor.
Why this is happening i don't know. I created listener also. But no use. How to solve this can any tell me pls... ! .
Thank u...!

hi,
Thank u bang for u r reply. It is not working sir. I added the listener as follows:
# listener.ora Network Configuration File: D:\oracle10g\network\admin\listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = HA14)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle10g)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = OVSL06)
(ORACLE_HOME = D:\oracle10g)
(SID_NAME = OVSL06)
(SID_DESC =
(GLOBAL_DBNAME = OVSL06)
(ORACLE_HOME = D:\oracle10g)
(SID_NAME = OVSL06)
I typed the following commands in command prompts
C:\>lsnrctl
LSNRCTL for 32-bit Windows: Version 10.1.0.2.0 - Production on 30-MAY-2007 16:29
:14
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> stop
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=HA14)(PORT=1521)))
The command completed successfully
LSNRCTL> start
Starting tnslsnr: please wait...
TNSLSNR for 32-bit Windows: Version 10.1.0.2.0 - Production
System parameter file is D:\oracle10g\network\admin\listener.ora
Log messages written to D:\oracle10g\network\log\listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=HA14)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROCipc)
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=HA14)(PORT=1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.1.0.2.0 - Produ
ction
Start Date 30-MAY-2007 16:29:28
Uptime 0 days 0 hr. 0 min. 2 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File D:\oracle10g\network\admin\listener.ora
Listener Log File D:\oracle10g\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=HA14)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROCipc)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
same error is getting as i am getting previously. Tell me solution pls....!
Thank u...!

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