4orig_table => 'unpar_table', 5int_table => 'par_table'); 6END; 7/ PL/SQL 过程已成功完成。 结束重定义的意义: 基表unpar_table 和临时分区表par_table 进行了交换。此时临时分区表par_table成了普通表,我们的基表unpar_table成了分区表。 我们在重定义的时候,基表unpar_table是可以进行DML操...
sql>create table par_table(id number primary key,timedate)partition by range(time)2(partition p1 valueslessthan(to_date('2004-7-1','yyyy-mm-dd')),3 partition p2 valueslessthan(to_date('2005-1-1','yyyy-mm-dd')),4 partition p3 valueslessthan(to_date('2005-7-1','yyyy-mm-dd'))...
3) Alter table exchange partition partition_name with table exchange table Note that during the exchange all rows of the exchange table must qualify for the partition to be exchanged, otherwise the following error is thrown ORA-14099: all rows in table do not qualify for specified partition. Th...
4 orig_table => 'unpar_table', 5 int_table => 'par_table'); 6 END; 7 / PL/SQL 过程已成功完成。 结束重定义的意义: 基表unpar_table 和临时分区表par_table 进行了交换。 此时临时分区表par_table成了普通表,我们的基表unpar_table成了分区表。 我们在重定义的时候,基表unpar_table是可以进...
When to Partition a Table什么时候需要分区表,官网的2个建议如下: (1)Tables greater than 2GB should always be considered for partitioning. (2)Tables containing historical data, in which new data is added into the newest partition. A typical example is a historical table where only the current mo...
Oracle Partitioning 一:When to Partition a Table Here are some suggestions for when to partition a table: (1)Tables greater than 2 GB sho...
Partitioning a regular/non-partitioned table can be done in five ways: A. Export/import method B. Insert with a subquery method C. Partition Exchange method D. DBMS_REDEFINITION E. MODIFY clause added to the ALTER TABLE SQL Statement. (From 12.2) ...
• The parent table referenced must be an existing partitioned table. All partitioning methods except interval partitioning are supported. • The foreign key cannot contain any virtual columns. • The referenced primary key or unique constraint on the parent table cannot contain any virtual colum...
to break down a table into partitions without knowing what the individual partitions are going to be used for. All aspects of partitioning have to be controlled by the application. For example, an insertion into a system partitioned table without the explicit specification of a partition will ...
With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "SCOTT"."SYS_EXPORT_TABLE_01": scott/*** directory=wjq tables=emp,dept dumpfile=scott_emp_dept.dmp logfile=scott_emp_dept.log Estimate in progress using BLOCKS method... Processing...