Oracle

1. Physical bad blocks and logical bad blocksThere is a concept in the database called data block consistency, Oracle's data block consistency includes two levels: physical consistency and logical consistency, if a data block at these two levels of

We know that SQL Server and Oracle have many similar principles. In particular, some commonly used SQL statements are based on standards. So they can also have some interoperability. Here's how to configure SQL Server to connect to an Oracle. And

Creating Oracle Connection servers in SQL ServerThe first type: interface operation(1) Expand Server Objects-- linked Servers-- right-click on "new linked server " (2) Enter the IP of the linked server(3) After the link is successfulSecond type:

Select * The From V$nls_parameter will show the values of Nls_characterset and Nls_nchar_charactersetThe methods for modifying character set Nls_characterset and Nls_nchar_characterset values are as follows:1, modify Nls_characterset:sqlplus "/As

Sdoug IntroductionSdoug member programs (SDOUG membership program), also known as the Oracle Shandong User group, referred to as Sdoug, are co-sponsored by Geu Yunjie, Yang Yunlong, and Nobuyoshi, and are designed to recognize and recognize those

Original works, from the "Blue Blog" blog, Welcome to reprint, please be sure to indicate the following sources, otherwise, the legal responsibility to pursue copyright.Deep Blue Blog:http://blog.csdn.net/huangyanlong/article/details/45021771linux7

1. Download Oracle 11g R2 for Windows version: http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.htmlThese include two compressed packages: Win64_11gr2_database_1of2.zip,win64_11gr2_database_2of2.zip2. Unzip the two

Oracle manages and presents database information through a data dictionary, which typically stores the metadata of the database and is the database's database. The commonly mentioned data dictionary consists of 4 parts:Internal RDBMS (x$) tables,

--Create a remote data connectionCreate DATABASE link DB_MZDB11 connect to ytmztwo identified by YTMZTWO909 using ' MZDB11 ';--Create a local directoryCreate directory Db_mz as ' C: ';--authorized users to read and writeGrant Read,write on directory

Win7 Installing the Oracle 10g (Vista) methodFirst download, 10203_vista_w2k8_x86_production_db (note to the next, otherwise there is no Refhost.xml

The Oracle index leaf block is dumpF:\oracle\product\10.2.0\db_1\bin>sqlplus/as sysdbasql*plus:release 10.2.0.4.0-production on Thu Apr 9 06:28:17 20 15Copyright (c) 1982, Oracle. ----> Get a TRC file under UdumpDump file

To modify the Dbca.rsp file:# # #因内容过多, cannot be displayed, see Attachment # # #To execute a command to create a DB instance$ dbca-silent-responsefile/u01/database/response/dbca.rspCopying Database files...37% CompleteCreating and Starting Oracle

EnvironmentOs:red Hat Linux as 5db:10.2.0.11. Add the log group ALTER DATABASE add logfile Group 4 ('/u01/app/oracle/oradata/oracl/redo04.log ') size 50m;2. Add a log group (the specified log already exists) ALTER DATABASE add logfile Group 4 ('/u01/

SELECT ... The syntax for the FOR UPDATE statement is as follows:SELECT ... For UPDATE [of Column_list][wait n| Nowait][skip LOCKED];whichThe of clause is used to specify the column that is about to be updated, that is, the row of the related table

Increase the size of the TMPFS under Oracle Linux and increase the 502M to 3G (note: The initial value is half of memory)First change the/etc/fstab tmpfs size to 3GAdd size=3g after Tmpfs,Ok,/etc/fstab edit completed, but Oel and redhat a little

This is for oracle11g, other versions of the test has not been known.First, use system to establish a connection, the password is the one you specified when you installed it, and then create a new user in the bottom "other user".Note 1: Be sure to

first, connect to the database to get the basic information of Oracle database;C:\users\administrator>sqlplus/nologSql*plus:release 10.2.0.3.0-production on Friday April 3 09:53:50 2015COPYRIGHT (C) 1982, 2006, ORACLE. All rights RESERVED.sql>

Introduction to Oracle 11g Virtual Column, 11 gcolumn The Oracle 11G Virtual column Virtual ColumnOracle 11G introduces Virtual columns in the table. The Virtual column is an expression that is calculated during runtime and is not stored in the

Oracle computing time functions (numtodsinterval, numtoyminterval), oracle computing functions   Numtodsinterval (, ), X is a number, and c is a string, Indicates the unit of x. This function converts x to interval day to second. Commonly Used units

Run the aix and linux Hosts of oracle to change the ip SpecificationRun the aix and linux Hosts of oracle to change the ip SpecificationChange the value in/etc/hostsFor linux:/etc/sysconfig/network-scripts/ifcfg-ethX,For aix: smitty tcpip-> Mininum