Oracle

There are four main functions in Oracle that support regular expressions:1,regexp_like: Similar to like function2,REGEXP_INSTR: Similar to INSTR function3,REGEXP_SUBSTR: Similar to SUBSTR function4,regexp_replace: Similar to REPLACE function They

"V$sqlarea" and "v$sql" are very useful views in which you can find the SQL statements that you find to be optimized for the least efficient execution. The value of the "disk_reads" column represents the amount of disk read by the statement in the

Oracle Database users manage Oracle permissions settings I. Classification of authority: System permissions: The system requires users to use the database permissions. (System permissions are for users). Entity permissions: The access rights of a

There is a problem with a client database that has been recovered through unconventional methods AWR cannot collect statistics (a library that was not recovered several months ago, because it was not rebuilt), and it is not easy to track database

The Oracle tutorial you are looking at is an introductory overview of Oracle Pl/sql. First, the purpose of pl/sql appearanceStructured Query Language (structured query Language, referred to as SQL) is used to access relational database a common

Many DBAs are still at Oracle 9i or 10g, possibly because of the Oracle 11g price issue. This article will explain the installation of Oracle 11g under Windows 7, and I hope you can see some of the new features of 11g. Recently unloaded their own

July 31, 2006, Oracle and Hewlett-Packard jointly announced that both sides have jointly developed a "reference match" to help it to accelerate the deployment of data warehouses based on HP server and storage platforms, Oracle (r) database 10g

This article originates from: http://www.dbasupport.com The answer here is not very comprehensive, these questions can be explained through a number of angles, perhaps you do not have to give a full answer in the interview process, only through your

One, what is a distributed database The Distributed Database System (ddbs:distributed) is developed on the basis of centralized database system. is a combination of database technology and network technology products. There are two kinds of

Some time ago in a migration of data pump and exp, found that the difference in efficiency is quite large. Here is an example of a simple comparison. This article compares the differences between IMP and IMPDP import. The comparison of exp and

Remote Error message: An authentication error has occurred, the required function is not supported CredSSP encryption Oracle Remediation Run Gpedit.msc Local Group Policy: Computer Configuration > Administrative Templates > System >

1. The following error occurred: Ora-12541:tns:no Listener, as shown in:The reason for the error is that we do not have the Listener listener service open and the workaround is to open the service in the service as shown in.2. The following error

Log on to Oracle ora-12154:tns with PL/SQL: Unable to resolve the specified connection identifierSqlplus/nologConnect/as SYSDBAStartupThe following error is reported:ORA-00119:INVALID specification for system parameter Local_listenerOra-00132:syntax

Find an online comparison of Oracle and DB2 data types, and write them down. Oracle db2/400 Oracle data types Precautions DB2 UDB Data type Precautions DATE DATETimeTIMESTAMP L

Environment Description:Source database environment:Operating system: Windows SERVER 2008R2 Database version: single Instance ORACLE 11.2.0.1target-side database environment:Operating system: Redhat Linux 6.5 x86 64bit database version: ORACLE 11g

--Multiple IF statements ( note: BEGIN END, IF condition then,elsif condition Then,else ... END IF ) begin if FALSE then Dbms_output.put_line (' Execute if statement ... '); elsif 　　True then Dbms_output.put_line (' Execute ELEIF1

RedHat Linux Fedora Core 5 successfully installed Oracle 10g Host Configuration:Intel P4 CPU 3.0 GHz512 MB memory80 GB hard drive 1. Prepare the host and operating system: 1. Physical memory: 512 MB2. 2 GB swap spaceNote: During the installation of

Oracle is a relational database management system suitable for large-scale, medium-sized, and micro-computers. It uses structured guery language as its database language. SQL mainly includes three functions: Data Definition, data manipulation

I. High cluster wait time problems in RAC1. Set the LMS process to FX 60. Do not adjust the number of lms processes too much.Note: process priority can be set after Solaris 10 Update 10 and Solaris 11. You can view the/etc/release Version. For

1. During RMAN backup, the physical bad blocks are checked by default.2. To check the logical bad blocks, use the following statement:$ Rman target/RMAN> backup check logical validate database;Note that the preceding statements are only checked and