EM connecting to two different databases

How do I connect to a second database?
I can connect to the first database ...
then I create a second database...
but can't find the second database so
I can administer it.

You have to use the Grid Control to get connection to several databases from the same application. Although you can get connection to several databases separately with the database control.
Joel Pérez

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Connecting to two different database instances from a swing application.

Hi All,
I am developing a swing application which needs to interact with two different database instances of two different weblogic servers.
More eloborately,
I have some data in DB_Instance1 running on[b] Weblogic_Server1 and I need to insert the same data into DB_instance2 running on Weblogic_server2. Is it possible. Could some explain me how to do that..
Thanks in advance...
Sreekanth.

Hi Rick,
Try logging onto both Server first. You'll have to use either 2 separate ODBC DSN's or 2 separate OLE DB connections. Set them both for Trusted Authentication, you'll have to configure that on the Server also.Then try your query.
If that doesn't work then you'll have to create a Stored Procedure or View that can link the 2 Server side.
Thank you
Don

Connecting to two different databases on different machine ..is it Possibl?

Hi EveryBody:
In My application I'm pulling some files from one server to another server useing FTP and then inserting the file data in one Oracle database on UNIX Machine1 and at the same time updating another Oracle database table on another UNIX Machine2 ...Below I posted the method foe database connection, I also provided the code for calling that method twice it works fine for the first database and connect successfully but the second one it hangs ....I don't know why ...
public void DB_connect(Database db,String dbip,String dbport,
          String dbsid,String dbuser, String dbpass){
//Conecting to Database
try{
db=new Database(dbip,dbport,dbsid);
          db.connect(dbuser,dbpass);
          System.out.println("Connection to Database Successful");
catch(Exception e){
System.out.println("Error Connecting to Database.");
//Calling the method in the main
DB_connect(db1,db1ip,db1port,db1sid,db1user,db1pass);
System.out.println("Successfully connected to the First DataBase ...");
DB_connect(db2,db2ip,db2port,db2sid,db2user,db2pass);
System.out.println("Successfully connected to Second DataBase ...");
Thanks in Advance

Can we display aprogress bar in
the User Interface till we get the connection
available ....Yes.
How ??? You create a second thread that does something. When the connection is established (or fails) it sets a flag so the other thread knows it is time to terminate.
Can u please provide code
snippet That I can't do. There are probably plenty of examples in one of the forums that deal with GUIs (which this is not.)

Problem connecting to two different databases from form

Hi all,
i am using 6i forms which needs to be connected to oracle 9i and 10g databases which is having different ip address(residing in different machines).i can connect to 10g database after configuring tnsnames.ora in my machine but still i cannot connect to 9i database. could anyone tell me what could be the reason.
thanks
mish

Hi Paul.
thanks for your help. i could able to solve the problem. since there was a change in the ip address (administrators do it sometimes!!) i couldn't connect. now its fine. thanks once again . have a great day.
thanks
mish

JDBC connection to two different machines from the same program

I want to use JDBC to connect to two different databases that are on two different MySQL installations on two different machines.
One of the installations is MySQL 4.1.12 and the other is 4.1.14-nt
For some reason, all my statements seem to be going only to one machine, even though I am very clearly set it up to go to two different machines.
Does anyone know whether connecting to two different installations from one program presents any unusual problems?
Thanks.

Unless there is some horrible defect in the MySQL JDBC driver (which I doubt!), there should be no problem and like the other poster says, please post snippits of your code so we can see what your doing...

How to add two different database connections on Model

Hi,
In my application, I need to create View Objects on different databases. So I need to add two different database connections on the Model.
But it seems like Model can be connected to only one database. I tried adding another project to add the second db connection. But after I created a read-only View Object in the second project, it didn't generate corresponding data control in the Data Controls panel.
Could anyone help me on this?
Thanks!

Do you mean adding the second project folder in ViewController->Project Properties->Libraries and Classpath?Yes, either that or: ViewController -> Project Properties -> Dependencies
And I didn't see the first Model project in the ViewController classpath. Otherwise it wouldn't work. The first model project IS in 'classpath'. Here's how:
ViewController -> Project Properties -> Dependencies
I tried this and recreated the View Object. Still didn't generate the datacontrol. No idea why you had to recreate the VO.
Is your VO in an application module inside the SECOND project?
After you are sure that everything is in the ViewController's classpath, just try restarting JDeveloper.
This is very basic. has to work.

CONNECTING FORM WITH TWO DIFFERENT DATABASES

HELLO ALL
Is there any way I can connect to 2 different databases at the same time. What I have is 2 different database for two different payroll systems. Now what I want to do is if user press a button I send some data from this payroll database to second payroll database using insert and update command.
I am using Form 5, one database is Personal Oracle 7 and second is Oracle 7.3. (I don't think versions matters but anyway)
Thanks
null

Hello,
Yes u can connect to with several database at a time using ODBC connection and Exex_Sql package supplied with Forms6i as a built-in. There is no Exec_Sql built-in supplied with Forms5, but there is a library named exec_sql.pll (Check it out) supplied with Forms5.
using this package u can connect with multiple DB at the same time.
here is an example-
Declare
v_ConnHandle Exec_Sql.ConnType;
v_CursHandle Exec_Sql.CursType;
v_NumRows Pls_Integer;
Begin
v_ConnHandle := Exec_Sql.Open_Connection('Scott', 'Tiger', 'ODBC:DBName');
v_CursHandle := Exec_Sql.Open_Cursor(v_ConnHandle);
Exec_Sql.Parse(v_CursHandle,'Select ename From emp');
Exec_Sql.Define_Column(v_ConnHandle, v_CursHandle, 1, v_EmpNAme);
v_NumRows := Exec_Sql.Execute(v_ConnHandle, v_CursHandle);
While Exec_Sql.Fetch_Rows(v_ConnHandle, v_CursHandle) > 0 Loop
Exec_Sql.Column_Value(v_CursHandle, 1, v_EmpName);
End Loop;
Exec_Sql.Close_Cursor(v_ConnHandle, v_CursHandle);
Exception
When Exec_Sql.Package_Error Then
If Exec_Sql.Is_Open(v_ConnHandle, v_CursHandle) Then
Exec_Sql.Close_Cursor(v_ConnHandle, v_CursHandle);
End If;
Message('Error ('| |Exec_Sql.Last_Error_Code(v_ConnHandle)| |') : '| |Exec_Sql.Last_Error_Mesg(v_ConnHandle));
End;
hope this help you.
best of luck.
null

APEX Application accessing data from two different databases

Hi All,
Currently as we all know that APEX Application resides in database and is connected to the schema of that database.
I want APEX Application to be running and accessing data from two different databases. Elaborating my question,
Currently, my APEX Production Application is connected with XXXX Schema of DB1 Database(Where APEX Resides). Now I want to add some pages into this APEX Application for REPORT Purpose, But I want to connect this REPORT APEX Pages to get data from Different Schema YYYY for Database DB2.
Is it possible to configure this scenario?
The reason for doing this is to avoid the REPORT related (adhoc queries) resource utilization effect on Production DB1 Database.
Thanks
Nil

1. If you do the joining of two or more tables in DB1 then all data is pulled over to DB1 and then the join is executed: so more data over the databaselink and more work for DB1. Better keep the joining stuff where the data resides and just pull exactly that data over that you need.
2. Don't know about your different block sizes. Seems a nice question for one of the other forums (DBA or SQL).
3. I mean create synonyms on DB1 for reports VIEWS in DB2.
Hope all is clear!

Can I use two different database with DBSystemLoginModule?

Finally I can login with Database user id by DBSystemLoginModule on Embedded oc4j server.
But I confused between [b]jazn-data.xml and system-jazn-data.xml.
Which xml do I have to edit for jdbcUrl and jdbcDriver?
Now I would like to use two different database(such as only sid is different).
In this case I want to show specific database name as realm name.
What should I do?
When I use DBSystemLoginModule, I edit JdbcUrl in system-jazn-data.xml.
So can I pass the parameter for sid programmatically?
And also I tried to run my application with other database with DBSystemLoginModule on Embedded oc4j server.
I changed few things(jdbcUrl at system-jazn-data.xml,jazn-data.xml in embedded-oc4j-server/config and database connection for BusinessComponents at Project Properties of Model/ViewController.
But I got some error.
Did I miss something?
----< my error messgae >------
500 Internal Server Error
JBO-30003: The application pool (customer.model.datamodel.CMAppModuleLocal) failed to checkout an application module due to the following exception:oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.lang.NullPointerException, msg=null at oracle.jbo.common.ampool.ApplicationPoolImpl.doCheckout(ApplicationPoolImpl.java:2002) Message was edited by:
Message was edited by:
sdcsdc

I think I understand now, you are modifing the custom login modules configuration within the system-jazn-data.xml file. This is a bit dangerous! Didn't you register the login module in your orion-application.xml? For example, this is the way I do it:
<web-module id="customProv-web" path="customProv-web.war" />
<persistence path="persistence" />

<security-role-mapping name="sr_developer">
<group name="developers" />
</security-role-mapping>
<security-role-mapping name="sr_manager">
<group name="managers" />
</security-role-mapping>
<jazn provider="XML">
<property name="custom.loginmodule.provider" value="true"/>
<property name="role.mapping.dynamic" value="true"/>
<property name="role.compare.ignorecase" value="true"/>
</jazn>

<jazn-loginconfig>
<application>
<name>customProv</name>
<login-modules>
<login-module>
<class>oracle.security.jazn.login.module.db.DBTableOraDataSourceLoginModule</class>
<control-flag>required</control-flag>
<options>
<option>
<name>data_source_name</name>
<value>jdbc/OracleDS2</value>
</option>
<option>
<name>roles_fk_column</name>
<value>userName</value>
</option>
<option>
<name>table</name>
<value>userinfo</value>
</option>
<option>
<name>groupMembershipTableName</name>
<value>groupinfo</value>
</option>
<option>
<name>groupMembershipGroupFieldName</name>
<value>role</value>
</option>
<option>
<name>usernameField</name>
<value>userName</value>
</option>
<option>
<name>user_pk_column</name>
<value>username</value>
</option>
<option>
<name>passwordField</name>
<value>passWord</value>
</option>
</options>
</login-module>
</login-modules>
</application>
</jazn-loginconfig>
<log>
<file path="application.log" />
</log>
<namespace-access>
<read-access>
<namespace-resource root="">
<security-role-mapping name="<jndi-user-role>">
<group name="administrators" />
</security-role-mapping>
</namespace-resource>
</read-access>
<write-access>
<namespace-resource root="">
<security-role-mapping name="<jndi-user-role>">
<group name="administrators" />
</security-role-mapping>
</namespace-resource>
</write-access>
</namespace-access>
</orion-application>

Connecting to two different SQLServers present on different Locations

Hi,
How can i connect to two different SQL Servers which are at different locations in the same session? IS there any way to do this without disconnecting from the first server?
cheers,
Sachin

Well,
actually my problem is that im reading Database
e Properties through a file which contains multiple
database entries. And i have only one Connection
Object so if im logged into one ex SQLServer in
London, I have a class which will allow me to loginto
another database SQL Server at New York. Now how do i
keep my connection as well as connect to New York
Database Server with the same Connection Object. If
possible, I need to logoff from the Server at London.
How do i do this? Any Ideas?Redesign. You have a connection object that can only have one connection. Either you have to close that connection and reconnect to the other one, or you need two of them. Those are your choices.

How to handle transactions when two different databases are involved.

consider two tables namely Table-A and Table-B part of two different databases namely ORACLE and MYSQL.
Now the project requirement is updating the Table-A(ORACLE) and Table-B (MYSQL) as one transaction. i.e. either update both the tables or rollback both the tables.
Now my question is how could i handle this situation using JDBC(Type-4) driver.Because i think at a time only one JDBC driver can be loaded into the JVM.

NareshAnkuskani wrote:
Now my question is how could i handle this situation using JDBC(Type-4) driver.Because i think at a time only one JDBC driver can be loaded into the JVM.No, that is not true.
But anyway, you need to use distributed (XA) transactions. i believe that the latest version (5.0) of mysql actually has support for XA transactions. you need to use a to setup a distributed transaction and attach the connections for the two databases to that transaction. then it should function as you desire.

Running same backup script on two different Databases

Hello All,
I am running same backup script on two different Databases.
But output is different.
Please give me your feedback.
1) Database 1:
OS: AIX
DB: 10.1.0.4.0
Script:
export ORACLE_SID=sid1
cd $ORACLE_HOME/bin
./rman nocatalog << EOF
connect target
ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE disk;
configure controlfile autobackup on;
backup as compressed backupset database plus archivelog delete input;
delete noprompt obsolete;
exit
EOF
6 Files created:
-rw-r----- 1 oracle dba 4140032 Jun 19 00:00 uvhlvjs8_1_1
-rw-r----- 1 oracle dba 38029824 Jun 19 00:00 backup_uuhlvjs8_1_1
-rw-r----- 1 oracle dba 781287424 Jun 19 00:20 v1hlvjsk_1_1
-rw-r----- 1 oracle dba 578027520 Jun 19 00:23 backup_v0hlvjsk_1_1
-rw-r----- 1 oracle dba 1222656 Jun 19 00:23 backup_v2hlvl7r_1_1
-rw-r----- 1 oracle dba 4259840 Jun 19 00:23 c-1052429639-20060619-00
-rw-r----- 1 oracle dba 4177920 Jun 19 00:23 SNAPCF_ATHENA.F
2. Databse 2:
OS: Linux (SLES 8)
DB: 10.1.0.5.0
Log Archive Filename Format: %t_%s_%r.dbf
2 files created:
1_17804_535674251.dbf 1_17837_535674251.dbf SID_2chlmrrl_1_1.1
1_17805_535674251.dbf 1_17838_535674251.dbf SID_2dhlms8c_1_1.1
I am also getting dbf file every one hour as below:
1_17868_535674251.dbf
DN

waiting for reply

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Synch Between Tables in Two different Databases

Synch between Two Tables in two different Databases.
I have two identical tables, table T1 in Database D1 and table T1 in Database D2. User can insert/update/delete/select from both of these tables in respective databases. Being said that how can keep them in Synch? Any thing added/modified/deleted should reflect in other. We like this to be Real-Time.
We are thinking of creating a cross (two way) DB link between them and then update/insert/delete both the tables when changing one. Any suggestions?
Thanks

One of my colleagues used snapshot in their previous projects, but he told me that the performance of it wind down while the records in tables increase. I have no idea about the exact situation, but I'm believing we'd think twice about it.
eilison
[email protected]

EM connecting to two different databases

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