Oracle

20 examples of bare devices and Oracle answers Guide A bare device, also called a bare partition (raw partition), is a special character device that is not formatted to be read by UNIX through the file system. A bare device

test simulation Export data from a table in a bad block of data files in an Oracle 11G databasePreviously thought that the dul corresponding version can only restore the highest database version consistent, today test found that Dul 10 can restore

Do indexes in an Oracle database need to be rebuilt on a regular basis? If you do not need to rebuild regularly, what is the reason? If you need to rebuild regularly, what are the reasons? Also, if you need to rebuild regularly, the indexes that

Any bigger than an int can never is assigned to a int or anything smaller than int (byte, char, or short ) without explicit cast. Constant values up to int can is assigned (without cast) to variables of lesser size (e.g. short to byte)

Database:The basic concept:Database management System (DB Management System,dbms): A software system for managing datarelational database management System (RDBMS)Database: A disk that holds data, which is part of an RDBMSWhat are the common

Database version:Oracle 9iTable TESTA,TESTB,TESTC, each with A, B two columns a b 001 002 a

I. Introduction to RAC 1, high availability    refers to a comprehensive solution that integrates hardware and software technologies. It guarantees that the application (service) can run uninterrupted without losing data, that is, the

Index1.B Tree Index (b-tree)B-Tree index is the most commonly used in our daily work index, everyone usually said in the job "index" by default is a B-tree index;The index is very simple, it is easy to understand, with a book directory to describe

After Oracle creates a new user, the client executes the SQL query with the following error message:Execute the query statement as follows:SELECT * from Sm_sales_order;ORA-00942: Table or view does not existCreate a new user and specify tablespace

This article mainly introduces the advantages and disadvantages of SQL Server, Mysql, Oracle Three kinds of databases, the need for friends can refer to the followingfirst, SQL ServerAdvantages:Ease of use, scalability for distributed organizations,

I. Overview of table SpacesThe tablespace is the largest logical storage structure in Oracle and corresponds to the data files in the operating system;Basic tablespace: A permanent tablespace used by the user to store the user's persistent

Recently began to learn Oracle database, according to my understanding of Oracle database is a powerful, complex, high-performance database, and expensive, the use of large enterprises, local tyrants dedicated. Learning a database to get started is

Windows7 Install Oracle 10g Prompt "program aborted, an unknown error occurred" workaround1. Modify Oracle 10g\database\stage\prereq\db\refhost.xmlIn Add later2. Locate the Oraparam.ini file in the install directory and#Windows

The Decode function is one of the most powerful functions of Oracle PL/SQL, which is now available only to Oracle Corporation, and the SQL implementations of other database vendors do not yet have this function. What is the use of decode? First of

1 Right-click on "Computer"--services and services and applications--Stop all Oracle-related services (Oracle-like ORACLEDBCONSOLEORCL).2 Start-All Programs-->oracle-->oracle Install the product-->universal Installer, "Welcome" after you start,

In Oracle, the state of the regular user becomes locked, expired, and so on, how to deal with this situation?First, if the locked state is OK, the DBA executes the ALTER user Scott account unlock directly.However, if it becomes a expired state,

First, installation1. Go to Oracle's official website to download the XE version of the installation package [download path] (Oracle Database Express Edition 2 for Windows x64), unzip. 2. Double-click Setup.exe to

GROUP BY and HAVING clause GROUP BY clauseUsed to divide information into smaller groupsEach group of rows returns a single result for that group--count the number of people in each department:Select Count(*) fromEmpGroup byDeptno--according to

1, what is ODF. NE,? Oracle data Provider is specifically written for. NET (odp.net), one for the Oracle Access API for Microsoft. NET environments.Detailed explanation http://www.oracle.com/technetwork/cn/testcontent/o23odp-084525-zhs.html for the

SQL error information sorting and solutions (Continuous updates) and SQL Solutions Sort out the various SQL errors you have encountered and corresponding solutions for future reference. The main platform is Oracle: ORA-01461: Can only bind the