表大小查看

單位：字節數

1M=1024KB

1KB=1024B

1.查看錶分大小：
  select segment_name, bytes
   from user_segments
   where segment_type = 'TABLE';

 2.查看錶實際大小
 analyze table ACL_ENTRY compute statistics;
select num_rows * avg_row_len
from user_tables
where table_name = 'ACL_ENTRY'