When am trying to migrate the data Oracle to postgres am getting this error and please give the solution for this.....
I am not familiar with Oracle. Nor am I a Java expert. But it appears that the code you are trying to run cannot find the Java class: oracle.jdbc.driver.OracleDriver. Either it has not been installed, or it is not on the Java CLASSPATH environment variable for the application. Please don't ask me about the CLASSPATH, I wouldn't be able to tell you how to set it properly on your system.
Also, just by-the-by, this is not a PostgreSQL error. This is an application error, possible due to improper installation (or maybe not). The fact that the application use PostgreSQL does not make it a PostgreSQL problem.
Lastly, just from looking at the error message, this appears to be something from EnterpriseDB. This is a commercial product, so perhaps their support people could help you with the problem. I am assuming you have a support contract with them, of course.
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"Irrigation of the land with seawater desalinated by fusion power is ancient. It's called 'rain'." -- Michael McClary, in alt.fusion