Oracle

1. Use multiple rollback segments Use multiple rollback segments to share contention for rollback segments to improve system performance. The system uses loops to allocate the rollback segment. When Oracle creates a database, the system

How to efficiently import Excel into Oracle? And the first two days of sqlbulkcopy import into SQL Server correspondence, Oracle has its own approach, just slightly more complicated. That is using Oracle's Sql*loader feature, and SQLLDR only

Many users want to know about Oracle RAC, but lack hardware conditions to install and understand RAC. Here we apply the Oracle VM and install it on the Xen virtual machine. The Oracle VM was officially launched on November 12, 2007, and the latest

Before oracle10g, it would be a hassle to optimize an SQL statement, but the SQL Tuning Advisor tool, introduced in oracle10g this release, would significantly reduce the workload of SQL tuning, but to use SQL Tuning Advisor, Make sure your

The data guard provides the following three kinds of protection modes: 1 Maximum protection mode (Maximum Protection) "Maximum protection" here means that the maximum protection data is not lost, that is, at least one standby and primary maintain

1, Partition table: (>2G) to optimize the large table (Range partitioning,list partitioninghash partitioning,composite Partitioning) --Create a partitioned table by range 1 CREATE TABLE Sales_range 2 (salesman_id number (5), 3 Salesman_name

Last night a friend consulted me, his database (win2008 11.2.0.1) appeared a large number of ora-00600[17059], the following error, so that help analyze the reasonsAlert Log ErrorSat Mar 19 21:31:02 2016Errors in File D:\app\administrator\diag\rdbms\

In the Oracle database of some win systems, it is known that Oracle needs to start the service before it is started, but occasionally there are two requirements: 1. Start the Oracle instance service, but do not want to start the database instance

0X01 test Environment Operating system: Window Server 2008 x64 oracle:oracle 11.2.0.1.0 0x02 Oracle Permissions Introduction An Oracle instance is a database, and creating a new database produces a new instance, and an instance runs a process

one, SQL ServerAdvantages:Ease of use, scalability for distributed organizations, data Warehouse functions for decision support, integration with many other server software, good price/performance, etc.Provides flexibility for data management and

This article from the following aspects to collate the concept and operation of the partition table:1. Table space and the concept of partitioned tables2. The specific role of table partitioning3. Advantages and disadvantages of table partitioning4.

In addition, some of the differences they have listed are quite meaningful, some may be due to their own MySQL DBA identity, the understanding of Oracle some deviation, some are dine suspicion. But the overall combination of the Baron Schwartz List

How many weeks is the current time of the system, which is the first few weeks of this year Copy Code code as follows: Select To_char (sysdate, ' ww '), To_char (sysdate, ' IW ') from dual; Select To_char (sysdate, ' DDD ') from

Data Buffer Hit ratio# The hit rate of the data block in the data buffer, usually should be above 90%, otherwise consider increase db_block_buffers (9i above but db_cache_size) Buffer nowait ratio# The wait rate in the buffer to get buffer

Starting with the Oracle8i version, in Oracle databases, where there is no special need for application, database monitoring does not need to be configured, and Oracle calls this method dynamic registration. The so-called dynamic registration,

First, error checking [Oracle@srtcreen ~]$ Ggsci Oracle Goldengate Command Interpreter for Oracle Version 11.1.1.1.1 oggcore_11.1.1.1.1_platforms_110729.1700 Linux, x64, 64bit (optimized), Oracle 10g on June 29 2011 19:43:29 Copyright (C) 1995,

A database version Leo1@leo1>select * from V$version; BANNER -------------------------------------------------------------------------------- Oracle database11g Enterprise Edition release 11.2.0.1.0-64bit Production Pl/sql

A The base of RMAN restoration and recovery In the use of Rman, restore and restore are two different concepts. Restore: Refers to accessing a previously generated backup, getting one or more objects, and then restoring those objects somewhere on

Oracle's 11GR2 version does not make much of a change to the data pump, mainly by adding support for the original version parameters and removing some small restrictions. This article describes the support of the data pump version. In 11.2, Oracle

The establishment and use of Oracle database linkFirst, the establishment of the database link:1, the database link building syntax is generally: Create databases Link[db_link_name] CONNECT to[USER_NAME] identified by [password] USING ' [tns_name] ';