oracle hard partitioning

|-----------------------------------------------------------------------------------------------predicate information (identified by Operation ID):---------------------------------------------------2-filter (To_char (internal_function ("Test_date"), ' yyyy-mm-dd ') = ' 2014-04-01 ')Statistical information----------------------------------------------------------1 Recursive calls0 db Block gets272 consistent gets0 physical Reads0 Redo Size327 Bytes sent via sql*net to client374 bytes received vi

Now there is a need: a document table to be partitioned by month, and if it is on Oracle 10g, only one field can be added. The Oracle 11g is not the same, you can use virtual column processing.Sql> select * from V$version;BANNER--------------------------------------------------------------------------------Oracle Database 11g Enterprise Edition Release 11.2.0.1.0

A problem occurred some time ago, that is, a data file in the RAC environment was put on a local hard disk instead of in the ASM disk group. It's a strange phenomenon. A problem occurred some time ago, that is, a data file in the RAC environment was put on a local hard disk instead of in the ASM disk group. It's a strange phenomenon. A problem occurred some time ago, that is, a data file in the RAC env

On Oracle 11g, you can partition on a virtual column, and this feature is useful, and here's a test:Sql> select * from V$version;BANNER--------------------------------------------------------------------------------Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-64bit ProductionPL/SQL Release 11.2.0.1.0-productionCORE 11.2.0.1.0 ProductionTNS for Linux:version 11.2.0.1.0-productionNlsrtl Version 1

tables, and generally create tables faster than inserted into tablesLs_sql:= 'CREATE TABLE fact_bond_profit1 nologging as SELECT * from Fact_bond_profit WHERE d_date between Add_months (To_date ( " "||V_date1||" ","'YYYY-MM-DD"'), -1) and To_date (" "||V_date1||" ","'YYYY-MM-DD"')-1'; EXECUTEIMMEDIATE Ls_sql; --to swap partitions EXECUTEIMMEDIATE'ALTER TABLE fact_bond_profit_new EXCHANGE PARTITION'||Partition_name||'With TABLE fact_bond_profit1'; --Generate log INSERT intoTmp_sysdimeSELE

In Oracle, indexes and tables can be partitioned as well. There are two types of partitioned indexes, local partitioned indexes (locals), and global partition indexes (globally). 1. Local Index The local partitioning index is created with a local keyword whose partition boundaries are the same as the table (that is, there is an index partition associated with each table partition), and the following is an

The Oracle tutorial you are looking at is the strategy for Oracle datasheet partitioning. This paper describes a statistical analysis of the hospital information system needs to partition the table, the need to partition the table to select the partition key, that is, to find the columns included in your Partition key (table properties), for large data management

partitioned table without any modification. When to use partitioned tables: 1, the size of the table more than 2GB. 2, the table contains historical data, new data is added to the new partition. (3). Table partitioning advantages and disadvantages table partitioning has the following benefits: 1, improve query performance: The query on the partition object can only search their own care, improve the speed

First, Introduction Oracle partitioning is a technique for handling oversized tables, indexes, and so on. Partitioning is a "divide and conquer" technique that provides scalable performance for large amounts of data by dividing large tables and indexes into manageable chunks, thus avoiding the management of each table as a large, separate object.

less than (MaxValue)15);Table created.2. Hash partitionConcept:Hash partitioning can be used for tables that do not effectively partition the scope, which helps to improve performance. The hash partition distributes the data in the table evenly to several partitions that you specify, and the column partition is automatically assigned according to the hash value of the partition column, so you cannot control or know which partition the record will be

Tags: style color io using AR for art CTIPartitions can be partitioned by two fields, compare the first column first, and if satisfied, ignore the second column, and if the first one does not, you need to compare the second column. This partitioning approach is a bit hard to understand and is not recommended for use. Sql> select * from V$version;BANNER--------------------------------------------------------

VARCHAR2 (+) NOT NULL,Last_Name VARCHAR2 (+) NOT NULL,Status char (1),Hire_date date NOT NULL)Partition by Range (hire_date) Subpartition by list (status)(Partition part_01 values less than (to_date (' 2017-01-01 ', ' yyyy-mm-dd ') tablespace emp_space01(Subpartition p1sub1 values (' 1 ') tablespace emp_space01,Subpartition p1sub2 values (' 0 ') tablespace emp_space01),Partition part_02 values less than (to_date (' 2017-04-01 ', ' yyyy-mm-dd ') tablespace emp_space02(Subpartition p2sub1 values

-partition statement:SELECT * from user_tab_subpartitions where table_name= ' student ';4. Interval partitioning (common in work)is a partitioning automation partition that can specify time intervals for partitioning, which is a new feature of oracle11g and is often used in practical work. is actually derived from the range partition, which finally enables the au

Maxvalues is included, the original partition table must be deleted 　　2. Delete a partition Grammar: ALTER table name DROP PARTITION partition table name Cases: -- Delete interval partition ALTER TABLE DROP PARTITION P3 -- When you delete a partitioned table, the data in the partition table is deleted together 　　3. Truncate partition Deletes data from the current partition, but it does not affect other partitions. Grammar: ALTER table name TRUNCATE PARTITION partition table name Cases: -- S

specification, the T_lognode_record is divided into three different tablespace (TS0,TS1,TS2), here is a technique, Month_mod = Month mod3, So that the child can not be manually maintained which month to divide into which partition. Of course, it is easy to use the month as a partition thereafter, for our current database is still far from enough, because even if the one months of data is still very ambitious, then we must do subpartition, the example is: CREATE TABLE T_lognode_record (

Long time no update blog, in fact, the work encountered a lot of problems in Google can find the answer, there is no need to record down. Today I would like to talk about the actual system encountered in the Oracle database problems, we hope to have a little bit of help on the good. Let me first describe the scenario I encountered: Our database is using Oracle 11g, and I think we immediately have a basic un

purpose of our partition, which is to make the data in each part balanced to speed up the query. This is often the case in actual work before oracle11g occurs, and it is usually done manually by the DBA or the developer, or by defining the MaxValue directly. Oracle 11g new features Interval Partitioning can solve this problem, the following describes the Interval partition. One,interval partition The

cannot be less than the value of the original partitioned table. If Maxvalues is included, the original partition table must be deleted　　2. Delete a partitionGrammar:ALTER table name DROP PARTITION partition table nameCases:--delete interval partition ALTER TABLE drawlist DROP PARTITION P3--After deleting the partition table, the data in the partition table will be deleted together.　　3. Truncate partitionDeletes data from the current partition, but it does not affect other partitions.Grammar:AL

tablespace_name---------------------------------------------------------------- --------------------------Ind_tan ind_tan_2013_8 Tan_2013_8ind_tan Ind_tan_2013_7 Tan_2013_7ind_tan Tan_2013_9 Tan_2013_9 5. Delete the migrated partition from the Source library:Sql> select Table_name,partition_name,tablespace_name from User_tab_partitions; table_name Partition_name tablespace_name-------------------------------------------- ----

Oracle Table Partitioning Detailed-Teach you step -by-Step Oracle Partitioned Tables1, create three different table spaces, simulate saving different ranges of data on different disks create tablespace test01 datafile'/u01/app/oracle/oradata/orcl02/test01.dbf'Size 500m; ---The data file can no longer be on the same sto