--删除分区 truncate table partition
declare day number;
begin
day := 20110901;
loop
execute immediate ‘alter table lbidw.TB_DW_MGR_01_DAY truncate partition DATA_‘ || day;
day := day + 1;
exit when day > 20110915;
end loop;
end;   

--分区大小
SELECT   owner,
         DECODE (partition_name,
                 NULL, segment_name,
                 segment_name || ‘:‘ || partition_name
                ) NAME,
         segment_type, tablespace_name, BYTES/1024/1024 , initial_extent, next_extent,
         pct_increase, extents, max_extents
    FROM dba_segments t
   WHERE 1 = 1 AND extents > 1
     and t.segment_name like ‘TB_MK%‘
ORDER BY 9 DESC,
         3
;

--统计分区数
select count(*),owner from dba_tables group by owner;