Bottleneck Between Oracle and Application Server

I am connecting Tomcat to Oracle thru thin JDBC driver. The link between tomcat & oracle is now found to be the bottleneck - too many JDBC calls that could be handled by the network. What are the possible solutions I can use now?
Some suggest to use Oracle Real Application Cluster (RAC) to scale the db tier. I am new to this. Would setting up RAC causes any change to my programs? Is it difficult to setup? Also, are there any other alternatives?

Web servers just handle static content, like HTML pages.
App servers have a few flavors.
A servlet/JSP engine has a Web server built into it, too. It can handle static content, like HTML pages, and also act as a container for servlets and JSPs. You can use JDBC with servlets and JSPs, of course.
A J2EE app server has a servlet/JSP engine and a Web server built into it. It can handle static content, like HTML pages and act as a container for servlets and JSPs. But it can also act as a container for EJBs - session, entity, and message EJBs. It has other services built in, like Java Messaging Service (queues), Java IDL (Corba), RMI, JNDI (naming services), XML parsers, JDBC (database access), and Java Transaction Service.
Enterprise Application Integration servers (EAI), like WebMethods, using XML messaging to tie multiple J2EE app servers together.
It's like those Russian dolls, where smaller ones fit inside larger ones. It's a hierarchy. - MOD

Similar Messages

Data sync between oracle and sql server

Greetings Everyone,
Your expert views are highly appreciable regarding the following.
We at work are evaluation different solutions to achieve data synchronization between oracle and sql server data bases. Data sync i mentioned here is for live applications. We are runnign oracle EBS 11i with custom applications and intending to implement a custom software based on .NET and SQL Server. Now the whole research is to see updates and data changes whenever happens between these systems.
I googled and found Oracle Golden Gate, Microsoft SSIS, Wisdom Force from Informatica....
If you can pour in more knowledge then it's great.
Thank You.

Most of the work involved has to be done through scripts and there is no effective GUI to implement OGG.However using commands is not vey togh and they are very intutive.
These are the steps, from a high level:
1.Get the appropriate GG Software for your source and target OS.
2.Install GG on source and target systems.
3.Create Manager and extract processes on source system
4.Create Manager and replicat processes on target system
5.Start these processes.
First try to achieve uni-directional replication. Then Bi-directional is easy.I have implemented bi-directional active active replication using Oracle DBs as source and target. Refer to Oracle installation and admin guides for more details.
Here is a good article that may be handy in your case.
http://www.oracle.com/technetwork/articles/datawarehouse/oracle-sqlserver-goldengate-460262.html
Edited by: satrap on Nov 30, 2012 8:33 AM

Question about transfer between oracle and sql server

Could i program to transfer lots of data between Oracle and SQL Server quickly?
I have tried make two connection between two databases, but it took me lots of time to transfer data.
How could I do it?
Thanks

Hi,
If you need to move data fast, then use the Oracle Migration Workbench to Generate SQL Server BCP data extraction scripts and Oracle SQL Loader files.
This is the fastest way to migrate the data.
In the Oracle Model UI tab of the Oracle Migration Workbench, right mouse click on the tables folder. there is a menu option to 'Generate SQL Loader ...' scripts. This will help you migrate your data efficiently.
Regards
John

How to create database link between oracle and SQL Server

Hello Everyone,
Here i have Oracle Database 9i and SQL Server 2005 databases.
I have some tables in sql server db and i want to access from Oracle.
How to create a database link between these two servers
Thanks,

Thanks for Everyone,
I was struggle with this almost 10 days....
I created Database link from Oracle to SQL Server
Now it is fine.........
Here i am giving my servers configuration and proceedure how i created the db link...@
Using Generic Connectivity (HSODBC) we can create db link between Oracle and SQL server.
Machine (1)
DB Version : Oracle 9.2.0.7.0
Operating System : HP-UX Itanuim 64 11.23
IP : 192.168.0.31
Host : abcdbt
Machine (2)
Version : SQL Server 2005
Operating System : Windows server 2003 x86
IP : 192.168.0.175
Host : SQLDEV1
User/PW : sa/abc@123! (Connect to database)
Database : SQLTEST (exsisting)
Table : T (“ T “ is the table existing in SQLTEST database with 10 rows)
Prerequisites in Machine (2):
a)     Oracle 10g software
b)     User account to access SQL Server database (sa/abc@123!)
c)     Existing SQL Server Database (SQLTEST)
d) Tables (testing purpose) (T)
Steps:
1)     Install Oracle 10.2.0.1 (Only SW,No need of database) *(Machine 2)*
2)     Create a DSN where your windows Oracle 10g SW resides *(Machine 2)*
Control panel >> Administrative Tools >> Data Source (ODBC) >> System DSN ADD
You can follow this link also.....
http://www.databasejournal.com/features/oracle/article.php/3442661/Making-a-Connection-from-Oracle-to-SQL-Server.htm
I created DSN as
DSN name : SQLTEST
User : SA/abc@123! (Existing user account)
Host : 192.168.0.175 (machine 2)
Already I have 1 database in SQL Server with the name SQLTEST
You can create DSN with different name also (not same as db name also)
3)     Create a hsodbc init file in $ORACLE_HOME\hs\admin *(Machine 2)*
Create init<DSN NAME> file
Ex: initSQLTEST
Copy inithsodbc to initSQLTEST
And edit
initSQLTEST file
HS_FDS_CONNECT_INFO = SQLTEST    <DSN NAME>*
HS_FDS_TRACE_LEVEL = OFF*
save the file....@
4)     Configure Listener.ora *(Machine 2)*
LISTENER_NEW =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.175)(PORT = 1525))
SID_LIST_LISTENER_NEW =
(SID_LIST =
(SID_DESC =
(SID_NAME = SQLTEST) *+< Here SQLTEST is DSN NAME >+*
(ORACLE_HOME = G:\oracle 10g\oracle\product\10.2.0\db_1)
(PROGRAM = hsodbc))
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = G:\oracle 10g\oracle\product\10.2.0\db_1)
(PROGRAM = extproc) )
:> lsnrctl start LISTENER_NEW
5)     Configure tnsname.ora *(Machine 2)*
SQLTEST11 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.175)(PORT = 1525))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = SQLTEST))
(HS=OK)
:> tnsping SQLTEST11
If No errors then conti….
6)     Configure a file *(Machine 1)*
Cd $TNS_ADMIN ($ORACLE_HOME/network/admin)
Create a file
$ vi TEST_abcdbt_ifile.ora
something=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST =192.168.0.175) (PORT=1525))
(CONNECT_DATA=
(SID=SQLTEST))
(HS=OK)
$ tnsping something
$ sqlplus system/manager
Your connected to Oracle database *(machine 1)*
create database link xyz connect to “sa” identified by “abc@123!” using ‘SOMETHING’;
select * from t@xyz;10 rows selected.
Thanks,
Edited by: ram5424 on Feb 10, 2010 7:24 PM

Database link between oracle and sql server

dear all,
i m a newbie to oracle and i need your help to know how to create a database link between oracle and sql server.my oracle version 10.2.0.3 and platform is redhat linux 5.7.your help appreciated.
thanks in advance.

[oracle@localhost ~]$ rpm -qa | grep -i odbc
php-odbc-4.3.9-3.15
unixODBC-kde-2.2.11-1.RHEL4.1
MyODBC-2.50.39-21.RHEL4.1
postgresql-odbc-7.3-8.RHEL4.1
freeradius-unixODBC-1.0.1-3.RHEL4.3
qt-ODBC-3.3.3-9.3
unixODBC-devel-2.2.11-1.RHEL4.1
unixODBC-2.2.11-1.RHEL4.1
is this showing odbc installed in os?

Replication between Oracle and SQL Server

Does anyone have any experience with replicating data between SQL Server and Oracle database system? If so, I am experiencing time out errors when replicating data. I replicating from SQL Server 2k to Oracle and it time out on the Oracle side.

how to configure my apply process to work with sql server by getway , I want to make replication
note :
I make dblink between oracle and sql and make insert from oracle to sql
is it sufficient to make replication by OEM between oracle and oracle and then add new apply process to work with gateway for sql server and how ?

I need step by step way to make replication between oracle and sql server

I succeeded in make dblink between oracle and microsoft sql
and I try to insert data using dblink to microsoft sql
what will I do now to make replication between them

how to configure my apply process to work with sql server by getway , I want to make replication
note :
I make dblink between oracle and sql and make insert from oracle to sql
is it sufficient to make replication by OEM between oracle and oracle and then add new apply process to work with gateway for sql server and how ?

Sorting differences between Oracle and SQL Server

Hello All,
This question is related to both Oracle and SQL Server
I have a requirement where I want to compare 2 tables line by line. One table is in Oracle and other table is in SQL Server
And suppose that both of the tables don't have a primary key. Now when I sort the records using order by clause for a column then -
Rows having null values in that column of Oracle are placed at the bottom.
Where as Rows having null values in the same column of SQL Server are placed right at the top.
How can I make either of them to behave like other.
My sole aim is to have same order of occurrence of rows in both Oracle and SQL Server tables so that I can compare them line by line.

For example :
select * from emp order by comm;
So all null value in comm column are at the end.
Now if you wish to get them on the top of select output then :
SELECT EMPNO,ENAME,JOB,MGR,HIREDATE,SAL,NVL(COMM,0) COMM,DEPTNO FROM EMP ORDER BY COMM;
Means i am using NVL (oracle function) function. If comm column is having null value it will converted to zero value at the time of exectuion of select query.
So, now comm column is having zero value in select output and SQL Server is having nulls at the top. I do'nt know who to make nulls to zero in SQL Server. So issue solved.
HTH
Girish Sharma

Developing database views between Oracle and SQL Server tables

I am on Oracle 10.2, my organization has many SQL Server databases as well and has now made
SQL server as company standard so many new databases will be developed in SQL Server. It is of course
not possible to convert all Oracle databases to SQL Server, so a mix environment will exist. Two questions:
1. Is it possible to develop database views in Oracle (10g in my case) which join Oracle tables with tables in SQL Server 2008? If yes, how. I have seen some heterogeneous connectivity setup to connect SQL Server to Oracle, but not sure whether it is possible to develop a database view across two databases.
2. I know it is not a SQL Server forum, but many DBA’s know both Oracle and SQL Server. Is it possible to develop views in SQL Server (SQL Server 2008 R2 in my case) which join Oracle 10g and SQL Server 2008 tables? I know in SQL Server, there is way to set up linked servers, but do not know whether it is possible to develop views.
Thanks a lot for your insight.

You can create views that join local Oracle tables and remote SQL Server tables. I'm pretty sure you can do the reverse as well but I haven't personally done it.
However, I would be very concerned about the performance you'd get if you created that sort of view. You'd very frequently end up in a situation where Oracle has to pull all the data in the remote table across the database link in order to apply predicates and join the data locally. That could be disastrous from a performance standpoint.
Justin

Hetrogeneoues connection between Oracle and SQL server

Hi ,
I am having Issues in Making Heterogeneous DB link between Oracle Xe and sql server .
Here is the scenario-
My Oracle and ms SQL 2003 are running on same machine(windows 2003) ,
I have followed this link and reached till 5 but I am not able to tnsping the SQLSERVER DNS entry .
http://www.databasejournal.com/features/oracle/article.php/3442661/Making-a-Connection-from-Oracle-to-SQL-Server.htm
Below are my lintener and tnsfiles
LISTENER.ORA
===========================================================================================================================================================
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
      (PROGRAM = extproc)
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
      (PROGRAM = extproc)
       (ENVS = "EXTPROC_DLLS=ONLY:C:\oraclexe\app\oracle\product\11.2.0\server\bin\OraClr11.dll")
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
LISTENERSQL =
(ADDRESS_LIST=
      (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
      (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1522))
SID_LIST_LISTENERSQL=
(SID_LIST=
      (SID_DESC =
       (SID_NAME = SQLSRVRDBLNK)
       (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
       (PROGRAM = hsodbc)
===========================================================================================================================================================
TNSNAMES.ORA
XE =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = testenviroment)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
SQLSRVRDBLNK =
(DESCRIPTION=
(ADDRESS= (PROTOCOL=tcp)(HOST=localhost)(PORT=1522))
(CONNECT_DATA=(SID=SQLSRVRDBLNK)
(HS=OK)
========================================================================================================================================================
Listner Status
C:\oraclexe\app\oracle\product\11.2.0\server\network\ADMIN>lsnrctl status LISTENERSQL
LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 19-JUL-2013 13:15:59
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
STATUS of the LISTENER
Alias                     LISTENERSQL
Version                   TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Production
Start Date                19-JUL-2013 12:17:39
Uptime                    0 days 0 hr. 58 min. 24 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\listener.ora
Listener Log File         C:\oraclexe\app\oracle\diag\tnslsnr\testenviroment\listenersql\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\PNPKEYipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1522)))
Services Summary...
Service "SQLSRVRDBLNK" has 1 instance(s).
Instance "SQLSRVRDBLNK", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
=========================================================================================================================================================
Now If I try to Tnsping SQL heterogeneous connection , i get
C:\oraclexe\app\oracle\product\11.2.0\server\network\ADMIN>tnsping SQLSRVRDBLNK
TNS Ping Utility for 32-bit Windows: Version 11.2.0.2.0 - Production on 19-JUL-2013 13:17:47
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION=
TNS-12533: TNS:illegal ADDRESS parameters
Need Help , please suggest
Thanks,
Manish

Hi ,
Thanks for the update I have changed the Listener as suggested , now my Listener File is
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
      (PROGRAM = extproc)
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
      (PROGRAM = extproc)
    (SID_DESC =
       (SID_NAME = SQLSRVRDBLNK)
       (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
       (PROGRAM = hsodbc)
       (ENVS = "EXTPROC_DLLS=ONLY:C:\oraclexe\app\oracle\product\11.2.0\server\bin\OraClr11.dll")
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST=
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.60.146)(PORT = 1521))
      (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
      (ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1522)))
========================================================================================================================
and tns entry
SQLSRVRDBLNK =
(DESCRIPTION=
(ADDRESS= (PROTOCOL= TCP)(HOST=192.168.60.146)(PORT=1522))
(CONNECT_DATA=(SID=SQLSRVRDBLNK)
(HS=OK)
========================================================================================================================
Restarted the listener
C:\Documents and Settings\Administrator>lsnrctl start LISTENER
LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 20-JUL-2013 12:27:38
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Starting tnslsnr: please wait...
TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Production
System parameter file is C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\listener.ora
Log messages written to C:\oraclexe\app\oracle\diag\tnslsnr\testenviroment\listener\alert\log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.60.146)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\PNPKEYipc)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1522)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Production
Start Date                20-JUL-2013 12:27:44
Uptime                    0 days 0 hr. 0 min. 5 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\listener.ora
Listener Log File         C:\oraclexe\app\oracle\diag\tnslsnr\testenviroment\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.60.146)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\PNPKEYipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1522)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "SQLSRVRDBLNK" has 1 instance(s).
Instance "SQLSRVRDBLNK", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
========================================================================================================================
Still Getting the same Error
C:\Documents and Settings\Administrator>tnsping SQLSRVRDBLNK
TNS Ping Utility for 32-bit Windows: Version 11.2.0.2.0 - Production on 20-JUL-2013 12:27:52
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION=
TNS-12533: TNS:illegal ADDRESS parameters
C:\Documents and Settings\Administrator>
========================================================================================================================
Do we need to change any thing in sqlnet.ora file for heterogeneous connection?
Thanks ,
Manish

Difference between webserver and Application server

Is there any way to stop the webserver but not the application server.
Do they run on the same port? How is that possible?

Is there any way to stop the webserver but not the
application server.It depends on server.
Do they run on the same port? no

Urgent: \connectivity between oracle and SQL Server

Hi I have a problem, a person in some of the dept's in office created a small oralce forms application that uses a oracle db10gr2 installed on personal pc (windows xp)to connect to a sql server to pull data. Recently the sql server was upgraded to blade 2008 from blade 2003. Then aplication stopped connecting correctly I think it has to do with the listener but not sure where the problem lies.
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 24-JUN-2010 14:51:12
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production
Start Date 24-JUN-2010 14:46:39
Uptime 0 days 0 hr. 4 min. 33 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File G:\myoracledb\network\admin\listener.ora
Listener Log File G:\myoracledb\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=sankar)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "cvr" has 1 instance(s).
Instance "cvr", status UNKNOWN, has 1 handler(s) for this service...
Service "hsodbc" has 1 instance(s).
Instance "hsodbc", status UNKNOWN, has 1 handler(s) for this service...
Service "mentor" has 1 instance(s).
Instance "mentor", status UNKNOWN, has 1 handler(s) for this service...
Service "myoracle" has 1 instance(s).
Instance "myoracle", status READY, has 1 handler(s) for this service...
Service "myoracleXDB" has 1 instance(s).
Instance "myoracle", status READY, has 1 handler(s) for this service...
Service "myoracle_XPT" has 1 instance(s).
Instance "myoracle", status READY, has 1 handler(s) for this service...
Service "person" has 1 instance(s).
Instance "person", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
these are diff instances of the sql server..
If anyone can please help? I do not know much about oracle on windows XP . thanks a lot!!!

Hi,
the system dsn works fine it even tests correctly, but teh database link does not work even for something as simple as
select sysdate from dual@person;
the db link is a public one so priviledges should not be an issue and the command i used to create it is:
create public database link person connect to USER identified by pwd using 'person';
also unfortunately this is an employee initiative (said empoyee has left without documentation or notes) and there is no oracle support.
thanks in advance.

Data type conversion issues between Oracle and SQL Server

Hi there, I am using Heterogeneous Services to insert into a SQL Server database. I am running into an issue between data types regarding Oracle's VARCHAR2 and trying to insert that into a SQL Server MONEY data type. I tried using the TO_NUMBER() function to convert my VARCHAR2 to a number, but that didn't seem to help.
Does anyone have any advice on how to work around this??
Thanks for any help,
ivalum21

ORA-02047: cannot join the distributed transaction in progress
ORA-06512: at "MY_PACKAGE_NAME", line 263
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC]DRV_Execute: DB_ODBC_ENGINE (1645): ;
[Microsoft][ODBC SQL Server Driver][SQL Server]Disallowed implicit conversion
from data type varchar to data type money, table 'tableA',
column 'total_amount'. Use the CONVERT function to run this query. (SQL
State: 37000; SQL Code: 260)
ORA-02063: preceding 2 lines from SQLSERVER_LINK
ORA-06512: at "RCDTPUMP.CAMPUSCALL_DATAPUMP_UNI", line 875
ORA-06512: at "RCDTPUMP.CAMPUSCALL_DATAPUMP_UNI", line 791
ORA-06512: at "RCDTPUMP.CAMPUSCALL_DATAPUMP_UNI", line 1156
ORA-06512: at line 1
That is what I get when I take out the TO_NUMBER()
Message was edited by:
ivalum21

Oracle and SQL Server connectivity

Hello,
Currently, we use Oracle as our enterprise database. I have a new requirement to develop a new application that must use MS SQL Server which must push and pull data from the Oracle database.
What is the best technical solution to have this communication between Oracle and SQL Server.
Thank you.

if you are connecting to SQL Server from Oracle then yes HS through ODBC (check HS forum), but if you are pulling data from SQL server you have an option of DTS or "shared" server through ODBC, see MS documentation for that......you won't find it on oracle forum......
Eugene Roytman

Data Sync between ORACLE and SQLServer

Hi,
I would like to here the possible options for "Bi-Directional Data Sync" between ORACLE 10g (Enterprise Edition Release 10.2.0.4.0) and SQL Server 7.0 (7.00 - 7.00.961 Standard Edition on Windows NT 5.0 ).
Please let me know the available tools or any other addons.
thanks and regards,
Suman.S

Are you looking for transactional replication between Oracle and SQL Server? Take a look at Wisdomforce [DatabaseSync.|http://www.wisdomforce.com/products-DatabaseSync.html]
It can perform a [real-time change data capture|http://www.wisdomforce.com/products-DatabaseSync.html] of transactions from redo log files and apply them into Oracle or SQL Server

Bottleneck Between Oracle and Application Server

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