oracle11g Exporting empty Tables

when exporting with exp, ORACLE 11G found that empty tables (no data or unused tables) could not be exported. Check the data, said that Oracle 11G has a new feature, when the table has no data, do not allocate segment to save space, so these tables are not exported. Using the following SQL query, find the table that cannot be exported, the Segment_created field value is ' NO '. Select * from user_tables where segment_created = ' NO ';

1, execute the following statement, batch generate modification statements, after the execution of the generated modified statement:

Select ' ALTER TABLE ' | | table_name| | ' allocate extent; ' from User_tables where num_rows=0;

Select ' ALTER TABLE ' | | table_name| | ' allocate extent; ' from User_tables where segment_created= ' NO ';

Copy the generated SQL for execution