Oracle

The concept and advantages of rman are not copied or pasted. If you are interested, You can google it. This article mainly describes how readers think during the experiment. The following rman files are based on nocatalog. In short, the use of

  In the database design, Oracle databases pioneered the design concept of tablespace, which makes an indelible contribution to the high performance of Oracle databases. Basically, many optimizations in Oracle databases are implemented based on the

  ORACLE10gr2 data import MySQL SolutionMySQL GUI Tools1. Download "MySQL GUI Tools" on www.mysql.com;This installation is for WINDOWS. : Http://dev.mysql.com/get/Downloads/MySQLGUITools/mysql-gui-tools-5.0-r17-win32.msi/from/pick2. Install MySQL

  The Blob field in Oracle is special. It has much better performance than the long field and can be used to save binary data such as sample slices.   Writing Blob fields is very different from writing other types of fields. Because Blob itself has

3.1 basic oracle Stored Procedure syntax3.1.1 Basic StructureCREATE OR REPLACE PROCEDURE(Parameter 1 in number,Parameter 2 IN NUMBER) ISVariable 1 INTEGER: = 0;Variable 2 DATE;BEGINEND stored procedure name 3.1.2 SELECT INTO STATEMENTSave the select

Today, I encountered A problem. In database A and database B, the table structure is the same. to export some records to table A of database B,The problem is that two identical tables in the two databases contain BLOB and CLOB fields. After thinking

Initialize data (data initialization ):It is mainly used to add records. There are two methods:1. Set the Default value of Page item during Design time.2. Set it programmatically during Run time.The setting of Default value is not mentioned here. It

Oracle Import utility allows you to extract data from a database and write the data to an operating system file. The basic format used by imp: imp [username [/password [@ service]. The following describes common usage of imp. 1. Get helpImp help =

How should I query the user session information in the Oracle database? The following describes in detail how to query Oracle user session information.AD:Oracle user sessions are expected to be well understood. The following describes how to query

1. Change Database downtime to archive ModeSQL> archive log listSQL> shutdown immediateSQL> startup mountSQL> alter database archivelog;SQL> alter database open; 2. Point the database archive to ASMSQL> alter system set db_recovery_file_dest_size = 2

Oracle commands (Course Notes) 1. start the Service (must be started) (1) listener (2) database Note: E: \ oracle \ product \ 10.1.0 \ db_1 \ NETWORK \ ADMIN listener. ora tnsnames. ora2. SQL plus visual tool dos 3. three system accounts Sys

Change the protection mode of dataguard View the current protection mode: SQL> select protection_mode from v $ database; PROTECTION_MODE--------------------MAXIMUM AVAILABILITY prepare to change protection mode to maximum performance mode: On the

Simulate a failover 1. Stop the listener of the standby database [oracle @ rhel132 ~] $ Lsnrctl stop2. the master database needs to be restarted. (If the listener is disabled in the slave database, the communication between the master database and

Oracle listener cannot be started. 1. Connection host string, says no listener SVRMGR> connect internal/oracle@orcl; ORA-12541: TNS:no listener SVRMGR>  2. Run the listener, indicating that the protocol-specific component of the address is

Oracle performance optimization (SQL) uses the IN operator as few as possible. Basically, all IN operators can be replaced by EXISTS. You can use not exists or external join + instead of the not in operator. When Oracle executes the IN subquery, it

Oracle partition, index, test (1) ----- insert only this time. See how to insert Fast Preparation SQL code -- data file alter system set db_create_file_dest = 'd: \ toby \ oracle \ data; -- tablespace create tablespace ts_sales_200901 datafile size 5

PROTECTION_MODE is UNPROTECTED at standby database analytics database version SQL> select * from v$version;BANNER--------------------------------------------------------------------------------------------------------------------------------Oracle

Partition index note (3) -- global partition index (2) -- local partition Index http://www.bkjia.com/database/201308/238634.html A global partition index contains keys from multiple table partitions in an index partition. The partition key of a

X $ bh X$BH Fixed Table Buffer Cache Diagram Column Type Description~~~~~~ ~~~~~ ~~~~~~~~~~~ADDR RAW(4) Hex address of the Buffer Header.INDX NUMBER Buffer Header numberBUF# NUMBERHLADDR RAW(4) Hash Chain Latch AddressSee . ADDRLRU_FLAG NUMBER 8.1+

Migrate the index segment to another tablespace Inorder to increase the index full scan performance and reduce scan table time, I do migrate the index segment to another tablespace which block_size is 16 k, the original is 8 k. this operation can