Table partitioning offers the following.
表分区特性提供以下收益。
DB2 9.7 table partitioning enhancements.
DB 2 9.7表分区增强。
Usually the table partitioning key will be a time-based column.
通常表分区键是基于时间的列。
TP will only benefit those queries that include the table partitioning key column.
TP只对那些包括表分区键列的查询有利。
The columns used in this definition are referred to as the table partitioning key columns.
该定义中使用的列被称为表分区键列。
You can store data in different partitions in the same table of a database using table partitioning.
您可以使用表分区将数据存储在同一个数据库表的不同分区中。
MTK now provides support for translating Oracle range partitioning (also known as table partitioning).
MTK现在提供对转换Oracle范围分区(也称表分区)的支持。
This article introduced the following DB2 table design features: table partitioning, MDC, DPF, and MQT.
本文介绍了以下DB2表设计特性：表分区、MDC、DPF和 MQT。
More exhaustive explanation can be obtained from developerWorks article, Table partitioning in DB2 9.
更详尽的解释可以参阅 developerWorks文章Table partitioning inDB2 9。
For TP, design decisions include selecting the column to use as the table partitioning key and number of partitions.
对于TP，设计决定包括选择用作表分区键的列和分区的数量。
The group of columns specified make up the partitioning key for the table —see sidebar, "Choosing a table partitioning key."
指定的列组成表的分区键 —参见边栏 “选择表分区键”。
However, since XML columns cannot be part of the table partitioning key, any unique XML values index will have to be created as a global index.
然而，由于xml列不属于表分区键的一部分，任何唯一xml值索引必须创建为全局索引。
This section discusses some observations about table partitioning that might not be very obvious and some things that we frequently get questions on.
本部分讨论关于表分区的一些不明显的观察值，以及一些常见的问题。
Whether a column should be used as table partitioning key for TP is not affected by whether that column is also used an MDC dimension and vice versa.
一个列是否被用作MD c维对于是否应该将它作为表分区键没有影响，反之亦然。
RANGE/TABLE PARTITIONING (Available with DB2 9) - splitting data by key range over multiple physical objects within a logical database partition.
RANGE/TABLE PARTITIONING（DB29提供） ——根据键范围将数据划分到一个逻辑数据库分区中的多个物理对象上。
In my last column, I explained how you can use table partitioning to organize data across multiple storage objects based on values in one or more columns.
在我的上一期专栏中，我阐述了如何使用表分区，基于一列或多列中的值，跨多个存储对象组织数据。
A typical design for a database with monthly roll-out based on sale_date, would be to use sale_date as the table partitioning key and create a separate partition for each month.
对于需要每月根据sale_date转出数据的数据库，一种典型的设计是使用sale_date作为表分区键，并为每个月创建一个单独的分区。
DB2 V9 introduced a table partitioning feature that can increase the potential size of a single table, and significantly reduce the maintenance effort required to manage very large databases.
DB 2V 9引入了一个表分区特性，它能够增加一个表的可能大小，同时能够显著减少管理大型数据库所需要的维护。
A partitioning key consists of one or more columns defined at table creation.
一个分区键由在表创建时定义的一个或多个列组成。
The partitioning key for each table in a tablespace that is associated with a database partition group determines if the tables are collocated.
在与一个数据库分区组相关联的表空间中，每个表的分区键可以确定表是否是并置的。
If the database designer has created a Primary partition Index on a table, queries should incorporate the partitioning column.
如果数据库设计者已在表上创建了主分区索引，那么查询应当与分区列结合。
This routine creates a copy of your existing table with the new partitioning key and loads it partially or fully with the data from the original table.
这个例程用新的分区键创建了现有表的一个副本并用来自原始表的数据对它进行部分或全部加载。
If database partitioning and range partitioning are used together, the rows in a table are first hashed across the database partitions and then range-partitioned within each database partition.
如果数据库分区和范围分区一同使用，那么表内的行首先会跨数据库分区做散列处理，然后再在每个数据库分区中执行范围分区。
It is useful when a table has a finite set of values for the fragment key (or partitioning key) and queries on the table have an equality predicate on the fragment key.
如果表格有一定数量的片段键(或者分区键)值，而且在片段键上有同等谓词的表格上查询时，它会很有用处。
Under index-controlled partitioning, the concepts of partitioned table, partitioning index and clustering were all intertwined.
对于索引控制的分区方法，分区的表、分区索引和群集这几个概念之间有点纠缠不清。
A new routine in DB2 9.7 named ADMIN_MOVE_TABLE allows you to automatically change the partitioning key of a table while keeping the table fully accessible for reads and writes.
在DB 2 9.7内有一个名为admin_move_table的新例程，可用来自动更改表的分区键，同时又能保持表对读写的完全可访问性。
However, the design of an MQT can be affected by which partitioning features are used on the base table.
然而，MQT的设计却可能受到基本表上使用的分区特性的影响。
The use of partitioning features on the base table does not need to take into account whether MQTs will be built upon this table.
基本表上分区特性的使用不需要考虑将来是否会在这个表上创建MQT。
The primary key and any unique index of the table must be a superset of the associated partitioning key.
表的主键和所有惟一索引都必须是相关分区键的超集。
A partitioning key is defined on a table with the CREATE table statement.
分区键是在一个表上用CREATEtable语句定义的。
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