cluster是簇，可以将两个或多个表捆绑在一起，它是一种数据库结构，在这个结构中，可以将两个或者多个表储存在相同的数据块或段中，加入到cluster中的每个表行将物理地存储在相同的块中，好像这些表在cluster key 处连接起来了一样。cluster 指集群
--2、表占用空间: select segment_name, sum(bytes)/1024/1024 as Mbytes from user_segments where segment_type='TABLE' group by segment_name order by Mbytes desc; --3、索引占用空间: select segment_name ,sum(bytes)/1024/1024 as Mbytes from user_segments where segment_type ='INDEX' group ...
Anundo tablespaceis a type of permanent tablespace used by Oracle Database to manage undo data if you are running your database in automatic undo management mode. Oracle strongly recommends that you use automatic undo management mode rather than using rollback segments for undo. Atemporary tablespa...
select owner,segment_name,segment_type,tablespace_name,sum(bytes)/1024/1024/1024 from dba_segments where tablespace_name='TBS_LDHB' group by owner,segment_name,segment_type,tablespace_name 以上
Oracle Database manages space within a tablespace based on the type that you create. You can create either of the following types of tablespaces: · Locally managed tablespaces (default) The database uses bitmaps in the tablespaces themselves to manage extents. Thus, locally managed tablespaces hav...
GROUPBYT.TABLESPACE_NAME,T.SEGMENT_TYPE ORDERBYT.TABLESPACE_NAME,T.SEGMENT_TYPE; 二、查看数据库表空间存储对象的大小 SELECT* FROM(SELECTSEGMENT_NAME, T.SEGMENT_TYPE, SUM(BYTES)/1024/1024SEGMENT_SIZE FROMUSER_SEGMENTST WHERE1=1 GROUPBYT.SEGMENT_NAME,T.SEGMENT_TYPE)T ...
select segment_name, segment_type, tablespace_name, bytes/1024/1024 as size_in_mb, bytes, extents from user_se 浏览0提问于2020-02-27得票数 0 1回答 Oracle DBA_EXTENTS封装 、 尝试由另一个所有者在DBA_EXTENTS中找到一个对象。当我在下面输入时,它的工作原理是:这项工作。但我正在尝试将查询保存...
select * from (select username, session_addr, sql_id, contents, segtype, blocks * 8 / 1024 / 1024 mb from v$sort_usage order by blocks desc) where rownum <= 20; 但有时会发现找出来的sql特别简单,怎么看都不像能占用几十几百G temp表空间的样子。为什么从v$sort_usage找到的sql_id有时是错...
ERROR at line 1:ORA-10635: Invalid segment or tablespace type 检查一下表空间使用的段管理：SYS@...
问Oracle Segment不等于Extents？EN众所周知，TRUNCATE TABLE是一种快速清空表内数据的一种方式，与delete...