desc extended f_tblog_online_mds;

2、查看分区

show partitions table_name;

3、根据分区查询，提高速度

select table_coulm from table_name where partition_name = ‘2014-02-25‘;

4、删除分区

   alter table table_name drop partition(dt=‘2014-03-01‘);

5、删除表

drop tablename;