Oracle

Oracle Study--oracle Wait event (3)Db file Parallel readThis is a very misleading wait event, and in fact this wait event is not related to parallel operations such as parallel queries, parallel DML. This event occurs when the database is recovering,

Oracle Study--oracle Wait event (5)Db File Single writeThis wait event usually occurs only in one case when Oracle updates the header information of the data file (for example, checkpoint occurs). When this wait event is obvious, it is important to

For Oracle databases, when does the Ogg extraction process get data from the database?Reference text:When GoldenGate fetches Data from the Database on Extraction for Oracle (Doc ID 1059583.1)Suitable for:Oracle goldengate-version 4.0.0 and

View a table with a high degree of fragmentationSELECT segment_name table_name, COUNT (*) extentsFrom Dba_segmentsWHERE owner not in (' SYS ', ' SYSTEM ')GROUP by Segment_nameHaving COUNT (*) = (SELECT MAX (COUNT (*))From Dba_segmentsGROUP by

-------------------------------Logical Structure------------------------------------ Reference Document: Chapter 12 Tablespace table Space Maximum storage unit Establishment object specifies that the table space is stored Segment segment: Can store

"This article describes"Once you are familiar with PL/SQL syntax, implementing Java calls to Oracle stored procedures is the primary purpose. This article describes how to write stored procedures, and how Java calls stored procedures."Introduction

Long is a type of special1, a Long data type is stored in a variable length string, the maximum length limit is 2GB.2, for the text beyond a certain length, the basic can only be stored with a long type, the definition of many objects in the data

"This article describes"This article will describe common commands for using Oracle, not "Daquan", but less practical."Command Introduction" Describe: Command: Database (1) To view the encoding

Transferred from: http://www.itpub.net/thread-719692-1-1.htmlSummaryA set of consecutive numbers, minus some of the middle number, how to find the remaining number of intervals (i.e., number of segments)? Knowing how to start and end of a segment,

First look at the encoding of the Oracle databaseSql> SELECT * from nls_database_parameters where parameter = ' nls_characterset ';PARAMETER--------------------VALUE--------------------Nls_charactersetAl32utf8This is derived from props$, which is

Tested many times, TP official website did not give the correct wording, and the search on the internet is all wrong.Tracking code, finally found the correct configuration, backup as follows, (by default7#zbphp.com) ' Db_type ' = '

"Introduction to this article"Recently, because of the needs of a project, from zero to learn from Oracle, now learn to share a record of things.The first is the installation, in the WIN8 installed 10G has failed, online various methods have tried,

The principle of  1 and Dataguard is dataguard by establishing a primary and standby group to establish its reference relationship. Once  standby is created, Dataguard passes the redo of the primary database (PRIMARY) to the standby database and

There are typically several reasons why Oracle databases take up too much hard disk space (for example, Oracle 10.2.0):1. Oracle's installation directory ... \oracle\product\10.2.0\admin\orcl\udump directory, tracking log files occupy a lot of hard

How C # Massive data is inserted into a database instantaneouslyWhen we do a large number of data append in the database, is not often because the data volume is too large and distressed?The so-called massive data, generally also tens of thousands

The last two days have been in for the installation of Oracle configuration monitoring can not be saved and then find a variety of solutions, and finally I actually configured it.Because of the lack of listening files, copy others into their own

Tag:oracle    view process     No. 06 Lecture  chapter 03--managing an oracle instance--learning process: $ id$ sqlplus / Nologsql> conn / as sysdbasql> startupsql> !$ ps -ef|grep  oracle   last view process-Knowledge point:initialization parameter 

Quickly detects the lock wait method in the Oracle database and finds out the oracle database In a large database system, to ensure data consistency, the system locks data when operating the data in the database. These locks include read-only locks,

Use the tool plsqldev to import Excel to the Oracle database, plsqldevoracle 1. Use the tool plsqldev 2. Open the excel file to be imported, click the office button, select Save As-other format, select Save type CSV (separated by commas) (*. csv),

Oralce archive log enabling and disabling example, oralce Archive Check whether the oracle database is in archive ModeSQL> select name, log_mode from V $ database; NAME LOG_MODE------------------------------------------TEST NOARCHIVELOG SQL> archive