Statistics in Oracle:Transfering statistics between database

It can be very handy to use production statistics on your development database, so that you can forecast the optimizer behavior.

You can do this the following way:

1. Create the statistics table.
exec DBMS_STATS.CREATE_STAT_TABLE(ownname =>'SCHEMA_NAME' ,stat_tab => 'STATS_TABLE' , tblspace => 'STATS_TABLESPACE');
Example:
exec DBMS_STATS.CREATE_STAT_TABLE(ownname =>'SYSTEM',stat_tab => 'STATS_TABLE');

2. Export statistics to statistics table
EXEC DBMS_STATS.EXPORT_SCHEMA_STATS('ORIGINAL_SCHEMA' ,'STATS_TABLE',NULL,'SYSTEM');

3. Import statistics into the data dictionary.
exec DBMS_STATS.IMPORT_SCHEMA_STATS('NEW_SCHEMA','STATS_TABLE',NULL,'SYSTEM');

4. Drop the statistics table.
exec DBMS_STATS.DROP_STAT_TABLE('SYSTEM','STATS_TABLE');