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Database Administrator's Guide, 12c Release 1 (12.1)

Managing Tables

20.3.3 Parallelizing Table Creationnumber of parallel execution servers when creating the table. See Also: Oracle Database VLDB and

Database Administrator's Guide, 12c Release 1 (12.1)

Managing Tables

Oracle Database includes the following components: the Oracle Database instance, which is a collection…UPDATE INDEXES ONLINE; See Also: Oracle Database VLDB and Partitioning Guide Oracle Database SQL Language Reference

Database Concepts, 12c Release 1 (12.1)

Indexes and Index-Organized Tables

Secondary Indexes on Index-Organized Tablesindex-organized table Oracle Database VLDB and Partitioning Guide to learn about creating secondary indexes on indexed-organized table partitions

Database Administrator's Guide, 12c Release 1 (12.1)

Managing Tables

20.7.9 Online Redefinition of One or More Partitionssubpartition that is being moved. See \" Moving a Table to a New Segment or Tablespace \". See Also: Oracle Database VLDB and Partitioning Guide

Database Administrator's Guide, 12c Release 1 (12.1)

Managing Processes

5.6.1 About Parallel Execution ServersDatabase SQL Tuning Guide for information about using parallel hints Oracle Database VLDB and

Database Performance Tuning Guide, 12c Release 1 (12.1)

Tuning the Database Buffer Cache

About the Database Buffer Cachestatements Oracle Database VLDB and Partitioning Guide for information about parallel execution

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Manually Specifying the Degree of Parallelism

Manually Specifying the Degree of ParallelismA specific DOP can be requested from Oracle Database for both tables and indexes. For example, you can set a fixed DOP at a table level with the following: ALTER TABLE sales PARALLEL 8; ALTER TABLE customers PARALLEL 4; In this example, queries accessing just the sales table use a requested DOP of 8 and queries accessing the customers table request a DOP of 4. A query accessing both the sales and

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Implementing an ILM System Manually Using Partitioning

Implementing an ILM System Manually Using PartitioningExample 5-11 illustrates how to manually create storage tiers and partition a table across those storage tiers and then setup a virtual private database (VPD) policy on that database to restrict access to the online archive tier data. See Also: Oracle Database SQL Language Reference for information about the CREATE TABLE SQL statement Oracle Database PL/SQL Packages and Types Reference for information

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Modifying a Subpartition Template

Modifying a Subpartition TemplateYou can modify a subpartition template of a composite partitioned table by replacing it with a new subpartition template. Any subsequent operations that use the subpartition template (such as ADD PARTITION or MERGE PARTITIONS ) now use the new subpartition template. Existing subpartitions remain unchanged. If you modify a subpartition template of an interval-* composite partitioned table, then interval

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

About Renaming Partitions and Subpartitions

Renaming a Table SubpartitionLikewise, you can assign new names to subpartitions of a table. In this case you would use the ALTER TABLE RENAME SUBPARTITION syntax.

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Single-Level Partitioning

Single-Level PartitioningA table is defined by specifying one of the following data distribution methodologies, using one or more columns as the partitioning key: Range Partitioning Hash Partitioning List Partitioning For example, consider a table with a column of type NUMBER as the partitioning key and two partitions less_than_five_hundred and less_than_one_thousand. The less_than_one_thousand partition contains rows where

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

PARALLEL_MIN_TIME_THRESHOLD

PARALLEL_MIN_TIME_THRESHOLDThis parameter specifies the minimum execution time a statement should have before the statement is considered for automatic degree of parallelism. Automatic degree of parallelism is only enabled if PARALLEL_DEGREE_POLICY is set to AUTO or LIMITED. See Also: Oracle Database Reference for information about the PARALLEL_MIN_TIME_THRESHOLD initialization parameter

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Creating a Composite Range-List Partitioned Table

Creating a Composite Range-List Partitioned TableExample 4-10 illustrates how range-list partitioning might be used. The example tracks sales data of products by quarters and within each quarter, groups it by specified states. A row is mapped to a partition by checking whether the value of the partitioning column for a row falls within a specific partition range. The row is then mapped to a subpartition within that partition by identifying the subpartition

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

About Adding Partitions to a Composite *-Hash Partitioned Table

Adding a Subpartition to a *-Hash Partitioned TableYou use the MODIFY PARTITION ADD SUBPARTITION clause of the ALTER TABLE statement to add a hash subpartition to a [range | list | interval]-hash partitioned table. The newly added subpartition is populated with rows rehashed from other subpartitions of the same partition as determined by the hash function. For an interval-hash partitioned table, you can only add subpartitions to range or interval

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Truncating Multiple Partitions

Truncating Multiple PartitionsYou can truncate multiple partitions from a range or list partitioned table with the TRUNCATE PARTITION clause of the ALTER TABLE statement. The corresponding partitions of local indexes are truncated in the operation. Global indexes must be rebuilt unless UPDATE INDEXES is specified.For example, the following SQL statement truncates multiple partitions in the range-partitioned sales table. ALTER

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Local Partitioned Indexes

Local Partitioned IndexesIn a local index, all keys in a particular index partition refer only to rows stored in a single underlying table partition. A local index is created by specifying the LOCAL attribute. Oracle constructs the local index so that it is equipartitioned with the underlying table. Oracle partitions the index on the same columns as the underlying table, creates the same number of partitions or subpartitions,

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Best Practice 6: Plan for NOLOGGING Operations in Your Backup/Recovery Strategy

Flashback Database and Guaranteed Restore PointsFlashback Database is a fast, continuous point-in-time recovery method to repair widespread logical errors. Flashback Database relies on additional logging, called flashback logs, which are created in the fast recovery area and retained for a user-defined time interval according to the recovery needs. These logs track the original block images when they are updated. When a Flashback Database operation

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

Splitting a *-Hash Partition

Splitting a *-Hash PartitionThis is the opposite of merging *-hash partitions. When you split *-hash partitions, the new subpartitions are rehashed into either the number of subpartitions specified in a SUBPARTITIONS or SUBPARTITION clause. Or, if no such clause is included, the new partitions inherit the number of subpartitions (and tablespaces) from the partition being split. The inheritance of properties is different when

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

PGA_AGGREGATE_TARGET

HASH_AREA_SIZEhas been deprecated and you should use PGA_AGGREGATE_TARGET instead.

Database VLDB and Partitioning Guide, 12c Release 1 (12.1)

PGA_AGGREGATE_TARGET

SORT_AREA_SIZEhas been deprecated and you should use PGA_AGGREGATE_TARGET instead.