https://docs.oracle.com/en/database/oracle/oracle-database/12.2/bradv/rman-recovering-tables-partitions.html#GUID-87B7F772-335F-4179-81C9-91678D026D01 下面演示表级别的恢复,实验使用如下步骤: 1.创建表t,及相应索引idx_t_name。 2.做RMAN全备。 3.查看当前scn。 4.删除表。 5.在rman中恢复表...
PARTITION BY HASH (empno) PARTITIONS 2 STORE IN (part_Data1,part_Data2); --往往我们不需要知道bash分区的名字,因为数据放在哪个分区是oracle根据bash算法存放的,并不是用户指定, 所以当用户插入一条记录,并不能确定放在哪个分区,这个不同于range和list 4.组合分区 组合分区中,主要通过在不同列上,使用“范...
进一步,可以写一个函数来删除数据表陈旧的数据,如下: -- delete the partition older than INPUT_DAYS days (exclusive) in INPUT_TABLEcreateorreplaceproceduredo_delete_old_partition ( INPUT_TABLEINVARCHAR, INPUT_DAYSINNUMBER )ASBEGINFORPIN(SELECTPARTITION_NAME, HIGH_VALUEFROMUSER_TAB_PARTITIONSWHERETABLE_...
OracleTablePartitions encapsulate the properties of an Oracle table's partitions and subpartitions. The partitions and subpartitions can be defined individually or by models which the database uses to create individual (sub)partitions. Where both individual and model definitions are allowed, the individ...
PARTITION BY HASH (empno) PARTITIONS 8 1. STORE IN (tbs01,tbs02,tbs03,tbs04,tbs05,tbs06,tbs07,tbs08); 1. hash分区最主要的机制是根据hash算法来计算具体某条纪录应该插入到哪个分区中,hash算法中最重要的是hash函数,Oracle中如果你要使用hash分区,只需指定分区的数量即可。建议分区的数量采用2的n次方...
PARTITION BY HASH (empno) PARTITIONS 2 STORE IN (part_Data1,part_Data2); --往往我们不需要知道bash分区的名字,因为数据放在哪个分区是Oracle根据bash算法存放的,并不是用户指定, 所以当用户插入一条记录,并不能确定放在哪个分区,这个不同于range和list 3、复合分区 说明:顾名思义,复合分区就由range+list+...
public OracleTablePartitions.ObjectType getObjectType() setName public void setName(java.lang.String name) Set the NAME of the (sub)partition. Mandatory for a subpartition template. Specified by: setName in interface DBObject Overrides: setName in class AbstractDBObject Parameters: name - set...
obclient>CREATETABLEtbl4(col1INTPRIMARYKEY,col2INT)PARTITIONBYHASH(col1)PARTITIONS8;Query OK,0rowsaffected 创建一级分区为 Range 分区,二级分区为 Hash 分区的表。 obclient>CREATETABLEtbl5(col1INT,col2INT,col3INT)PARTITIONBYRANGE(col1)SUBPARTITIONBYHASH(col2)SUBPARTITIONS5(PARTITIONp0VALUESLESS TH...
partition by hash (empno)partitions 8store in (emp1,emp2,emp3,emp4,emp5,emp6,emp7,emp8);组合分区:范围哈希组合分区:create table emp (empno number(4),ename varchar2(30),hiredate date)partition by range (hiredate)subpartition by hash (empno)subpartitions 2...
Answer: When using Oracle partitioning, you can specify the 1) global or 2)local parameter in the create index syntax: Global Index: A global index is a one-to-many relationship, allowing one index partition to map to many table partitions. A global index can be partitioned by the range...