Oracle

These days in large data storage experiment, in a lot of data to perform the process of the database problems can not continue to execute, the preliminary inference is because the large data volume insertion causes the database connection to

1. Sequence (sequence)sequence : A collection of database objects that can be used by multiple users to produce unique valuesAutomatically provide unique valuesShared objectsMainly used for primary key self-incrementLoading sequence values into

Note: All software is not finally installed under Program Files (x86) PL/SQL Developer show not logged on Open PL/SQL Developer as an administrator2. TNS cannot parse the specified connection identifier　　　　Check the installation directory of

Second, the SQL languageSQL structure Query Language structured queries languageSQL statement: DDL statement DML statement, DCL statementDdl--data define language--create, alter, drop-data definition languageDml--data Management language--insert,

---------Mathematical Functions1. Absolute valueS:select ABS ( -1) valueO:select ABS ( -1) value from dual2. Rounding (Large)S:select Ceiling ( -1.001) valueO:select ceil ( -1.001) value from dual3. Rounding (small)S:select Floor ( -1.001)

October 14 to the electronic deployment of the system, with exp, IMP Guide Library command to achieve the successful implementation of the Oracle database export, import, in this, but also published an article Oracle database Export Import, explain

1. Hardware and operating system platform (P6 570):[Email protected]/]# prtconf | grep TypeProcessor TYPE:POWERPC_POWER6CPU Type:64-bitKernel Type:64-bit[Email protected]/]# oslevel-s7100-02-02-1316Database version 11.2.0.3.02. There is a DATAVG

This is a question that I have always been concerned about.11G about this problem has improved, to 12C more is a number of new featuresFor a discussion of the new features of 11G, refer to my blog http://blog.csdn.net/dbcrocodile/article/details/2117

This is a sophomore writing in the QQ space in an article, I remember that the problem took me the whole day to fix it, so experienced quite deep, so at that time deliberately recorded the process of the settlement, and today suddenly have the

There is a feature in the project that needs to get data from an Oracle database, which was thought to be very simple, and changed the original SqlClient into a OracleClient call.The result is far less simple than you think. There are a lot of needs

Install Oracle 11GR2, error: [INS-06101] IP address of localhost could not be determined This error occurs because the host name and the/etc/hosts file are inconsistent, just write the hostname and its IP to the/etc/hosts file, OK. To view host name

The error is as follows:Ignoring required pre-requisite failures. Continuing ...Preparing to launch Oracle Universal Installer from/tmp/orainstall2015-01-29_03-14-51am. Please wait ...DISPLAY not set. Please set the DISPLAY and try again.Depending

Method/Step1 download version of Oracle 12c R2 forwindows：Http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html includes two compressed packages: winx64_12c_ Database_1of2.zip,winx64_12c_database_2of2.zipUnzip the

The reasons are:Oci.dll version is incorrectRequires Instant clientWindowsInstallation InstructionsDownload the appropriate Instant client package for your platform (even if you are using 64-bit Windows, you must be a 32-bit version of Instant

First mapping one, creating "project"Designer-Projects, click the Insert item icon, In the Project dialog box, under the Definition tab, enter the project name, such as SAKILA_DWH, to save Second, import knowledge moduleProject → knowledge module →

In the article "Oracle HS (heterogeneous Services) in-depth analysis and collaborative gateway workflow ", we mainly introduce the principle of HS and how to work with Gateway. Now that we understand the role of Gateway, we need to install and

Recently, Oracle system basic debugging passed, it is time to set up Oracle with Rhel automatically start and shut down the service, the reason to put this task in the last to do, because I think this should not be difficult, but really implemented,

ORA-12541: TNS: no listenersSolution:1. Connection host string, no listener reportedC: \ Documents ents and Settings \ u120594> connect username/password @ orcl;ORA-12541: TNS: no listenerC: \ Documents ents and Settings \ u120594>Ii. Run the

How to encrypt rman backup sets in oracle Let's take a look at an oracle rman backup set encryption method. I hope this example will help you.   Data security is becoming more and more important. It doesn't mean that your production database is

Oracle multi-Table query optimization and Oracle Optimization ORACLE has a high-speed buffer concept. This high-speed buffer is used to store the executed SQL statements. Therefore, oracle has to do a lot of work when executing SQL statements, such