partition part_1valuesless than (5), partition part_2valuesless than (10) )--创建局部前缀索引;分区键(id)作为索引定义的第一列createindexlocal_prefixed_indexonlocal_index_example (id, name) local;--创建局部非前缀索引;分区键未作为索引定义的第一列createindexlocal_nonprefixed_indexonlocal_index_...
create table local_index_example ( id number(2), name varchar2(50), sex varchar2(10) ) partition by range (id) ( partition part_1 values less than (5), partition part_2 values less than (10) ) –创建局部前缀索引;分区键(id)作为索引定义的第一列 create index local_prefixed_index on...
介绍Oracle分区表、分区索引的原理、应用场景和日常维护,以及分区表在数据库性能优化中的重要意义, 熟练通透地学习Oracle分区表的创建、维护、分区裁剪等。 课程简介 oracle分区表是Oracle日常开发、管理、性能优化非常重要的技术手段,当数据库表段达到或大于2GB时,Oracle强烈推荐使用分区表技术,Oracle分区表能够提升数据库...
You can turn indexing on or off for the individual partitions of a table. A partial local index does not have usable index partitions for all table partitions that have indexing turned off. A global index, whether partitioned or not, excludes the data from all partitions that have indexing t...
2728--Create local PREFIXED index on Four_Seasons29--Prefixed because the leftmost columns of the index match the30--Partitioning key CREATE INDEX i_four_seasons_l ON four_seasons ( one,two )31LOCAL (32PARTITION i_quarter_one TABLESPACE i_quarter_one,33PARTITION i_quarter_two TABLESPACE i...
Figure 2-6: Locally partitioned index architecture Oracle Global Index versus Local Index Question:What is the difference between an Oracle global index and a local index? Answer: When using Oracle partitioning, you can specify the 1) global or 2)local parameter in the create index syntax: ...
create tablespace tbs1; create tablespace tbs2; create tablespace tbs3; create table members ( id number, name varchar2(32), create_time date) partition by range(create_time) ( partition p1 values less than (to_date('2023-02-01', 'yyyy-mm-dd')) tablespace tbs1, -- 指定分区p1放在tbs...
When the structure of a partitioned table is synchronized during a full synchronization, the partitioned table is converted to a non-partitioned table. During incremental synchronization, operations on partitioned tables in the source database may fail to be synchronized to the destination database ...
Add the new partitions you want to create to the table Reload the data from the dump file As with the modifications above, any local indexes will be automatically dropped and recreated, and any affected global index partitions or any nonpartitioned indexes will be marked as unusable. The fol...
However, Oracle provides the function of online redefinition tables, which can be used to transform ordinary tables into partitioned tables. You can refer to this example: http://blog.itpub.net/post/468/13091 The second point is that if you use the local partition index, then the tablespace...