Oracle

Database Home > Related LinksRELATED LINKS) "Area >" Alert Log Content (Alertlog content) "  View Alert logs Each database has a alert_.log file. This file is located in the same server as the databaseif $oracle_base is set, this file

Achieve the following goals1, monitor the Oracle database monitoring and the status of the instance, if the monitoring or the instance hangs, then starts, and the Mail informs, the script attempts to start the corresponding service2, if the service

1. The optimizer (Optimizer) is an optimization tool for SQL analysis and execution that is responsible for making the SQL execution plan, which is responsible for ensuring that SQL performs the most efficiently, such as determining how Oracle

COLLABORATE 14–shoug Forum Shanghai Oracle User Group 2014 Summit RegistrationThis event is organized by Oracle ACS Advanced Services and Shoug Shanghai Oracle user.the event date is June 7, 2014 13:30 ~ 18:00the specific event address is within the

The stored procedure of PL/SQL Foundationstored procedure: A procedure is a subroutine used to complete a specific task ( A collection of code )/* Sub-Program Advantages:1. Modular, decomposition of the program into a logical module; 2. reusability,

The concept of partitioning tables and tablespaces is distinguished between the design of Oracle partition tables: tablespace: A table space is a collection of one or more data files, all of which are stored in the specified table space, but are

First, NVLOfficial explanation: PURPOSENVL lets you replace null (returned as a blank) with a string in the results of a query. If expr1 is null and then NVL returns EXPR2. IFEXPR1 is isn't null, then NVL returns EXPR1. If EXPR1 is null, then EXPR2

before 11g, maintaining the partition requires manual. After 11g, interval is used to automate the expansion of partitions, simplifying maintenance.According to annual INTERVAL (Numtoyminterval (1, ' Year '))according to Month INTERVAL

There are three types of Oracle optimizer, rule (based on rules), cost (based on costs), and choose (selectivity), which we all know to set the default associated Oracle optimizer, which can be passed to the Init.ora file Optimizer_ Various

The following error occurred while starting the database[Email protected] ~]$ Sqlplus/as SYSDBASql*plus:release 11.2.0.4.0 Production on Mon 5 21:56:00 2014Copyright (c) 1982, Oracle. All rights reserved.Connected to an idle instance.[email

The machine room is powered down, so Oracle's Datagard from the library needs to be restarted:1 Login sqlplus Start, error message:Sql> STARTUP MOUNT;Ora-16032:parameter log_archive_dest_3 Destination string cannot be

1.1. ASM: PRCR-1079 An error occurred while starting the ASM listener. Error cause: The LD_LIBRARY_PATH variable is not configured. As a result, oraagent. bin cannot find the library file. Solution: Configure the LD_LIBRARY_PATH

1. Data Recovery Advisor (DRA) Description 1.1 DRA description DRA automatically collects data fault information when an error occurs. In addition, it can check faults in advance. In this mode, it can detect and analyze data faults before the

-Add a temporary Column Alter table tablename add filedname_temp number (2 ); -Leave the value of the temporary column empty. Update zyt set id_temp = null; ----- # alter table tablename modify filedname null; -The field value to be updated is

I. Incremental backup scriptLevel 0 backup script: The red part is the directory of the custom backup fileCopy codeThe Code is as follows:# Script.: BackupFull. sh# Creater: xyh# Date: 2014-03-08# Desc: backup full database datafile in archive with

1. query the number of columns in the table Select count (column_name) from user_tab_columnswhere table_name = 'table name'; -- the table name is capitalized.Or: Select count (column_name) from user_tab_columns where table_name = upper ('table

This document describes how to use SQL Plan Management to manage SQL Execution plans. SQL Plan management provides components for capturing, selecting, and evolving SQL Plan information to prevent performance degradation caused by sudden changes in

Event Waits Time (s) Avg wait (MS) % DB time Wait Class Read by other session 4,914,569 9,98

This article will introduce to you how to back up and delete the scripts for archiving logs of the dg standby database on the win platform rman. I hope this method will be helpful to you. I always think that using windows to run oracle is unreliable.

The repeated fields are set to null. in oracle, we use the lag Function for analysis. If you need it, please refer to it. Use the LAG Analysis FunctionThe repeated fields are set to null.Example: The data in the test table TEST_XX is as follows: To