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I want to port my database from MySQL to Oracle 12c. What is the best way to do that?
My project is written in Java.
The Best way to start with is Oracle's utility which you can found Here.
But then you also need to verify data types of your fields because it creates problem with some complex data types like BLOB etc
Oracle has provide the documentation for migration.
http://www.oracle.com/technetwork/database/migration/mysql-093223.html
For migrating application, If you are using any ORM then you have start working on the configurations first.
If your application has a lot of SQLs/procedures then you need help from your DBA team. They can migrate data as well as procedures etc.
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I have set up a JPA Database connection for my Eclipse Java project to a PostGreSQL database. I was wondering if there was a way to create a class for one of the tables without doing everything by hand.
Yes,you can use hibernate reverse engineering. Pretty much with some simple set up, it will generate java pojo class for you.
See:
http://javafws.blogspot.com/2013/04/generate-hbm-files-pojo-classes-in-eclipse.html
and
http://www.mkyong.com/hibernate/how-to-generate-code-with-hibernate-tools/
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I've installed Oracle 12c, SQL Developer, and have created several tables...but in my schema.
I want to create a Oracle DB backend to a JAVA front end application.
Once created, are all schemas available to any user with the appropriate permissions or are they local to the user who created them?
That's more than one question. But, you create an account (or multiple accounts) to own the tables and stored procedures and functions. And yes, once created anyone can access it (as long as they have the required permissions). And yes, they can run the stored procedures and functions you create (again, if they have the required permissions).
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I am building a small java application that shall run locally on a system. The data I intend to input is little stuff like my daily expenses, a couple of contacts I have, and a couple of notes of things I want to remember.
To save the data for this matter I think installing a database like MySQL or Oracle would be an overkill. In my past projects I always used those databases.
How would I have to manage the data of a small program? Are there any ready to use solutions in the java world? Maybe with the possibility to use it together with JPA?
You should look into Apache Derby:
http://db.apache.org/derby/
or HyperSQL:
http://hsqldb.org/
They're both lightweight database engines that you can fire up on application start-up, ideal for smaller projects. They also both have Hibernate dialects for JPA.
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I'm getting data as an Access file.
My application uses PostgreSQL/Java. I'd like to convert the Access database to PostgreSQL.
can any one help me to code this
I doubt there is any simple automatic method. You will have to create ddl statements to make the tables in postgresql (not sure if you can export ddl from access), export the data from access to a csv, and then use postgresql copy from command to populate the tables.
Or you could consider trying this tool:
http://docman.sourceforge.net/home_html/projects/sql/exportSQL3.txt
but it looks like a dev version, it may not be mature.
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I am a student. I need to make a application. I have built the GUI. Now I need to know how to do it?
I have heard about sql server compact, but does it work together with j2me? If not, something to solve the problem?
It will be better if you can pass me a example. If you couldn't, not worry, I just to need to know a database program for mobile (with j2me).
Could it be possible without use a database program? For example, using a text file? Or any other storage mechanism.
Appreciate any help.
In j2me you can use RMS. But you can't handle with large data. Some Third party database's also available for j2me development. You can use that API's. Also refer this existing discussion on same in this forum. And look at database connection using j2me article.