查看数据库中某个用户下的表的创建时间

select create,last_ddl_time from dba_objects where owner='SCOTT' and object_name='EMP';

select create,last_ddl_time from dba_objects where owner='CRMOS' ;

select sum(bytes)/1024/1024||'M' from dba_segments where owner='SCOTT' and segment_name='EMP';