解决11g无法导出空表的问题
select table_name from user_tables where NUM_ROWS=0
Select 'alter table '||table_name||' allocate extent;' from user_tables where num_rows=0
alter table DISPATCHIMG allocate extent;
select table_name from user_tables where NUM_ROWS=0
Select 'alter table '||table_name||' allocate extent;' from user_tables where num_rows=0
alter table DISPATCHIMG allocate extent;