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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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Using production database. Is there any way to stop save anything from my code while doing debugging.
Is there any property file flag by i able to use only in reading mode
Such a solution doesn't exist out of the box. You could try to use an other DB user which has no right to write when you debug your production code.
A custom solution (which need refactoring) would be to check the current environement of the application before performing write operations (e.g. with a pom parameter injected into your backend).
NB: it would be safer to have a second environement with a copy of the production DB to debug it safely
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I have thousands of table in the database that needs to convert in hibernate java entities.What are the possible ways to do this task?
Use Eclipse Dali Java Persistence Tools refer to this link on how to generate the entities.
I would write a simple Java program to read the database meta data of the tables and column names in the tables. It then could write out a Java class file per each table using the column names for the class variables.
A sample program that reads the DB meta information is here. It could quickly be adapted to reading in the DB tables and writing out the Java classes.
Sample Java DB Meta Data Program
A better set of examples for the generic JDBC Metadata API is here
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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).