Setting up two database on oracle - oracle10g

I am using Oracle Database 10g Express Edition on windows.
I want to install two database instance on one system. Both the instance will have similar db structure but are of different version and at one time I'll be using only one instance.
Can anybody help me how can I achive this?
Thanks!

It is not possible to install multiple instances on Express Edition.
http://download.oracle.com/docs/cd/B25329_01/doc/install.102/b25143/toc.htm#BEIEJGGF

Related

Does oracle soa quick start installation needs oracle database installation or does it come with some embedded database?

I am new to oracle SOA products and learning.
I have installed the fusion middlewre 12.2.1.2.0 soa quick install distributin and I am wondering does it require any database. I know that in production architecture it certainly needs oracle database but as far as development environment is concerned which database does it come with ?
Also how to see/modify these files related with database configurations.
Thanks
If you have installed the Oracle SOA Suite quick start then it comes with a pre-configured instance of Java DB, you don't need to have an Oracle database to start to use the suite, unless you have some special requirement.

Use Postgresql as a datasource for Microsoft Analysis Services

Has anyone managed to use Postgresql as a datasource for SSAS? The Postgresql .NET connector seems promising, but the SSAS view wizard does not seem to be able to see the tables in the database.
Try using the ODBC connector. I've had success getting other tools to connect to PG using it. The EnterpriseDB installers not only include a well packaged, working version of PG for windows, they include working, correctly installed drivers.
http://www.enterprisedb.com/products-services-training/pgdownload
try pg_bulkload for load from via c# & from mssql to pgsql
copy & bcp (ssis) for second direction (pgsql->ssas)
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It is actually possible to hack the Postgresql .NET connector and implement a "MSSQL compatibility mode", where the [ and ] around tables and schema names are removed. Using this, the list of tables does not appear in MS SSAS, but it is possible to replace them by views.

Oracle 11g and Oracle 10g Install together?

I have installed Oracle 10g and now want to install 11g also...How can I do it?.. I know that ORACLE_HOME environment variable need to be configured for each "oracle"..
Can you describe me steps how to do this?
Thank you very much in previous.
Thank you It helped me so much...
The most important is that I should have chosen %ORACLE_HOME% like %ORACLE_BASE%...
Just %ORACLE_BASE% should be the same...And it works.
There's ususally not a lot of reasons why Oracle databases of different versions cannot run on the same machine, be it Windows or Linux/Unix. Reasons can be if you run Clustering software, which may not be of a lower version than any database version involved. Similar with Oracle Grid or Cloud. Other than that, I can't really think of reasons, but there may be excpetions, linked to specific OS. Usage of ORACLE_HOME's is how Oracle manages different databases and versions. The Oracle Homes should be different for each database, the Oracle Base should be the same, the central inventory must be shared, and the ownership (of Oracle Homes) may be shared or separated. Sharing Oracle Home is an option for advanced users only.

Oracle Driver Installation

I am having Oracle 10g installed on my laptop and have downloaded ojdbc14.jar driver for the same. The problem is, my operating system is Windows 7, and I'm not having option to create a Data Source for Oracle since I m not having oracles driver installed. I m having option to create a Data Source for SQL server 6, but I want to get connected to Oracle. Please Help.
By 'Data Sources', I'm guessing that you mean Data Sources (ODBC), under Control Panel > Administrative Tools. Is this correct?
I've set up ODBC Data Sources that connect to Oracle databases before, but to do that I've needed the Oracle client to be installed. However, if you're having the full database installed on your laptop (as your question suggests), you won't need the client - that's only used to connect to databases running on other machines. I believe the full database contains everything in the client, so you should be able to set up an ODBC Data Source pointing to the database on your laptop once the database has been installed.
The ojdbc14.jar just contains the JDBC classes to talk to an Oracle database, and only programs written in Java (and other languages that run on the JVM such as Scala, Groovy or Clojure) can use it. This jar on its own not enough to be able to set up an ODBC data source.
Oracle currently has 1 version that is certified for windows 7. That version is 11.2. They have indicated that they plan to certify 10.2.0.5 if this happens there will likely be a patch that will be needed.
This is probably why the Data Source does not work, either ODBC or OLEDB.
Another possibility is that you have installed the 32bit version of Oracle and your OS is 64bit then you would need to use the 32bit Data Source administrative tools.
I have figured out the solution for my problem. All that I needed to do is put ojdbc14.jar file in my class path and then I was able to use it. Though by doing so, I needed to make some change in the code. I was no more able to use Class.forName("sun.jdbc.odbc.JdbcOdbcDriver") instead I needed to use Class.forName("oracle.jdbc.OracleDriver") also instead of using my data source as "jdbc:odbc:somename" I needed to use jdbc:oracle:thin:#localhost:1521:xe.

Good OleDB/ODBC provider for PostgreSQL

I'm in need of a functional OleDB data provider for PostgreSQL. It should be similar to the ODBC provider for MySQL. See http://dev.mysql.com/downloads/connector/odbc/5.1.html
The postgres software catalog has some providers on there.
dotConnect for PostgreSQL (from Devart) offers a pretty good one. It is fast and works. The free version will give you your basic ADO.net support, the pay offers everything else. ODBC doesn't have a free version.
http://www.devart.com/dotconnect/postgresql/
edit
Adding the direct link to the ODBC connector as it is on a separate page.
https://www.devart.com/odbc/postgresql/
If you want to check the last version of ODBC for PosgreSQL :
http://www.postgresql.org/ftp/odbc/versions/
Enter in the "msi" folder for the installer.
But be careful, when you are using ODBC, there is a 32bits and a 64bits version. So choose the right one.