Hello, To make dropping a column fast in a huge table, what I do is: make the column unused first, then drop it. SQL> alter table HUGE set unused column PEOPLE_NAME; Table altered. Elapsed: 00:00:01.60 SQL> alter table HUGE drop unused columns; Table altered. Elapsed: 02:08:25.18 umm...still cost some time, do we have another way to make it fast? Thank you very much.