While browsing On internet Today i found some script that will help you to compare data between two schema in Oracle for those who don’t love to use tools you can Download them from :

Script Number One
Script Number Two

There are Serveral Tools Used for Comparing such as :

1-Open Source application for comparing two tables of data http://s.awads.net/Q3jmCw
2-TOAD FOR ORACLE
3-Oracle SQL DEVELOPER 
4-Oracle Enterprise Manager (OEM).
5-Compare any Two Database http://www.dbsolo.com/schema_comparison.html .
6-RedGate to Compare Data, schema , Database .


Thank you 
Osama Mustafa