Multiples Databases in a single Report

Hi all experts...
How I can create a parameter to chosse multiples databases... In a single report!
regards

Wagner,
If you have CR Server installed on your network, you can use the Business View Manager to create a Dynamic Data Connection.
As soon as you add the Business View to your report as the data source, a choose database parameter will be added to your report automatically.
Also, if your BIG idea works out, please post it. We all love new ideas. Especially when they work.
Jason

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Multiple databases in a single query

I need to query multiple databases in a single query.
e.g.
Database d1 contains table t1 with column id
Database d2 contains table t2 with column id
I need a query like
SELECT * FROM t1, t2 WHERE t1.id = t2.id;
is this possible in jdbc? if yes can anyone help with some sample code?
thanks,
Ashish Saraf

It is not possible using the JDBC API to query tables in two or more databases using a single query. The reason is that a JDBC Connection is made to a single data source.
However, some databases support the idea of federations or linked tables. What you do is inside the database manager link or federate a table that is present in another DBMS. Then, pose a single JDBC query to the one DBMS which will have its own table and links to the external tables.
Another approach is to use a special JDBC driver with a built-in integration engine that will perform a query across multiple databases. In effect, the system poses separate queries to the different databases and integrates and joins the data together for you automatically on the client-side. That is much easier than doing it yourself in code, but that is also possible for simple queries.
As part of my research program, we have released a shareware version of the UnityJDBC driver that can query multiple databases using a single SQL query. For more information, see:
http://www.unityjdbc.com
http://www.cs.uiowa.edu/~rlawrenc/research/projects.html
Sincerely,
Dr. Ramon Lawrence
Assistant Professor
Department of Computer Science
University of Iowa
[email protected]

How to add multiple databases for a single frontend

We have a project based on distributed databases and we have to workout on .Net framework.I want to know some information of connecting multiple databases for a single frontend and how can we access them.
If so we have connected 2 databases for a single frontend in future if I want add one more database to it how it will be possible to do it without disturbing the current connectivity.
Please help me in resolving this problem.
Thanks......

hi,
what do you mean by connecting 2 databases? can you explain further?
using entityframework you can connect to different databases
public class CustomerContext : DbContext
public ReportContext()
: base("DefaultConnection")
public DbSet<Customers> Customers { get; set; }
and your connectionstring (config file)
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=(LocalDB)\v11.0;AttachDbFilename=D:\\Database\Project.mdf;Integrated Security=True" providerName="System.Data.SqlClient" />
</connectionStrings>
you can add more connection strings on it.
https://msdn.microsoft.com/en-us/library/vstudio/cc716756(v=vs.100).aspx
https://msdn.microsoft.com/en-us/library/ms254978(v=vs.110).aspx
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Can we combine multiple data sources in single report?

<span style="font-size: 10pt; font-family: Verdana">Can we combine multiple data sources in single report?</span>

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I am newbie to RAC and would like to get some clarification if anyone has done this, google search comes up with few hits on this topic, so obviously this is not doable.
In our case we have one database supporting critical applications and few other not so critical but are used very extensively between 9-5, so what is the use of RAC if I cannot consolidate all my databases into one cluster, or if I need a separate cluster for each of these critical databases?
I have been all the Oracle docs that keep repeating one database multiple instances and one instance-one machine-one node, they don't even advise running multiple instances on a single node?.
I appreciate any insight.
Thanks.

ora-sql-dba wrote:
Can you give more details on how you would setup multiple databases running different versions on a single RAC cluster, I am yet to find any documentation that supports or even elaborates on this topic.You can configure a cluster with 12 nodes. Then, using dbca, configure a dev instance for nodes 1 and 2, a prod1 instance for nodes 3 to 6 and a prod2 instance for nodes 7 to 12.
You also can configure each of these instances for all 12 nodes. And use it on all 12 nodes.
Or, after configuring it for all 12 nodes, you can start the dev instance on nodes 1 and 2, prod1 on 3 - 6 and prod2 on the remaining nodes. If dev needs more power, you can for example shutdown prod2 on node 12 and start another dev instance there.
My issue is with the 2nd option - running more than one instance on the same node or server. Why? Each instance has a basic resource footprint ito shared memory needed, system processes required (like db writer, log writer, sys monitor) etc. It does not make sense to pay for that same footprint more than once on a server. Each time you do, you need to reduce the amount of resources that can be used by each instance.
So instead of using (for example) 60% of that server's memory as the SGA for a single instance, if you use 2 instances on that server you now have to reduce the SGA of each to 30% of system memory. Effectively crippling those instances by 50% - they will now have smaller buffer caches, require more physical I/O and be more limited in what they can do.
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How to access multiple database present in single instance

Hi Team,
In oracle 11.2, can there be multiple databases in an instance??? In one of our environment, I could see multiple databases in an instance. Could you please help me in giving the data dictionary or query to access those databases?
Actually, querying v$database, I could see only one database which is same as instance name. But in inventory, there are multiple database in an instance?
I am still not exactly clear about this. Can someone help me with this?
Thanks!
Vidhya

In Oracle one instance manages one (1) database. A database consists of multiple *schemas*.
Other vendors erroneously call a schema 'database'.
So, no, you didn't see multiple databases.
There is also one datadictionary, consisting of a set of views.
All views beginning with dba_ list the entire database, all schemas.
All views beginning with all_ list the objects you have access to.
All views beginning with user_ list your own objects.
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Oracle also has online documentation at http://docs.oracle.com
From your question it is clear you should read the document called the 'Oracle Concepts Manual'.
You can find all documentation for 11gR2 here Oracle Database Online Documentation 11g Release 2 (11.2)
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Sybrand Bakker
Senior Oracle DBA

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Hello
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I have a database table called "Items" that includes fields
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multiple queries? Any help would be greatly appreciated. Thanks in
advance.

It seems like you are trying to do a subreport. You can nest
reports within the report feature...just check out the subreport
feature under the help section. If that doesn't help let me
know.

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Kurt

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declare @loop int;
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HTH,
Carl

Opening multiple databases in a single file

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I would suggest taking a look at the example programs in the /examples directory in the install.   ex_env.c covers basics on creating an environment and creating a database in that environment.   This program could be easily modified to create 1000 databases.
thanks
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We have a Web I report built based on universe(Oracle DB- Utf-8 codepage), In Data base tables there is a data with multiple languages. But when I run Web I report it is showing the data which is in english but data other than english is showing inverted "?". Could any one please suggest me how the data to be supported in all languages for the Web I report.
Thanks,
Mallareddy D.

You should be creating a universe using the table with filter utilizing a column which accepts a parameter value of language and shows the data in that specific language. This concept is already used in SAP standard audit universe which accepts language for any query and shows the data in that language.. The logic for the derived column for the table should look something like below Table.LANGUAGE = @Prompt(Select language)

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Hi friends,
I want to install Solution manager in the same system which I have installed ECC6. So I want to install another database(10g). Can any one tell me the possibities to install it.
regards,
Nageshwar

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yes, it is possible.
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best regards

How to connect multiple database in a single app?

hi ppl,
Im being asked to provide a application which is database independent.
I need ur ways to approach this issue.
if u have a solution, do drop in here.
Thanks & Regards,
intelnbril

on the paper, the hibernate persistence framework can achieve that.
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Multiples Databases in a single Report

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