Oracle 11g新特性 Interval Partition

分区(Partition)一直是Oracle数据库引以为傲的一项技术,正是分区的存在让Oracle高效的处理海量数据成为可能,在Oracle 11g中,分区技术在易用性和可扩展性上再次得到了增强。在10g的Oracle版本中,要对分区表做调整,尤其是对RANGE分区添加新的分区都需要DBA手动定期添加,或都使用存储过程进行管理。在11G的版本中的Interval Partition不再需要DBA去干预新分区的添加,Oracle会自动去执行这样的操作,减少了DBA的工作量。Interval Partition是Range分区的一个扩展。

1、Extended Composite Partitioning

In previous releases of Oracle, composite partitioning was limited to Range-Hash and Range-List partitioning. Oracle 11g Release 1 extends this to allow the following composite partitioning schemes:
Range-Hash (available since 8i)
Range-List (available since 9i)
Range-Range
List-Range
List-Hash
List-List

2、使用Interval Partition也有一些限制

 You can only specify one partitioning key column, and it must be of NUMBER or DATE type.
 Interval partitioning is not supported for index-organized tables.
 You cannot create a domain index on an interval-partitioned table.
 Interval partitioning is not supported at the subpartition level. ...

3、Interval Partition也可以创建复合分区

 Interval-range
 Interval-hash
 Interval-list

原文:https://blog.csdn.net/jolly10/article/details/82620802

猜你喜欢

转载自www.cnblogs.com/xibuhaohao/p/10270949.html
今日推荐