Does Operations on blob fields in Oracle produce a large number of redo operations?

Does Operations on blob fields in Oracle produce a large number of redo operations? Check whether the blob field produces a large number of redo operations. The answer is no. Here is an experiment to test whether the Oracle database version is 11.2.0

Solution to Oracle dbstart failure

Solution to Oracle dbstart failure Solution to Oracle dbstart failure [Oracle @ CentOS-1 ~] $ DbstartORACLE_HOME_LISTNER is not SET, unable to auto-start Oracle Net ListenerUsage:/u01/app/oracle/product/12.1.0/dbhome_1/bin/dbstart ORACLE_HOMEModify

Dual in Oracle

Dual in Oracle For Oracle dual, we need to clarify the following points: First pointDual is not a acronym but a complete word. Dual refers to logarithm, Which is dual and dual when used as an adjective. Second pointThe dual table in Oracle is a

Oracle recursive functions

Oracle recursive functions Oracle start with connect by usage Connect by prior recursive algorithm in oracle In Oracle, the start with... connect by prior clause connect by is used in structured queries. Its basic syntax is:Select... from tablename

Build and manage Oracle 11g Active Data Guard

Build and manage Oracle 11g Active Data Guard Note: You can refer to the notes and ideas of many people on the Internet, and sort out notes after your own hands-on experience for your reference only. Data Guard differs from RAC in that in general,

MySQL binary case sensitive

MySQL binary case sensitive Why is MySQL Case Insensitive ?? I was almost dazzled. Make another query. This is the result of Shenma. You can use binary to convert a string to a binary string for comparison. After adding binary, it

Oracle cross-database query (database link)

Oracle cross-database query (database link) How to Create a database link for cross-database Oracle Query Grant permissions to the dbuser account on the local Oracle Database SQL> grant create database link to dbuser; Configure the tnsnames. ora

Installation of Oracle Database 12C in Linux

Installation of Oracle Database 12C in Linux Install Oracle Database 12C in Linux. After the installation, Oracle Configuration Manager fails to be properly installed, which does not matter. It will be installed later. It must be about environment

Greenplum synchronization to Oracle script

Greenplum synchronization to Oracle script Developed a solution to synchronize data from Greenplum to Oracle, and wrote a script for regular scheduling. Installing Oracle 12C in Linux-6-64 Install Oracle 11gR2 (x64) in CentOS 6.4) Steps for

GoldenGate synchronizes Oracle Data to GreenPlum

GoldenGate synchronizes Oracle Data to GreenPlum Source endOracle 11.2.0.4 RAC 2-NodesOracle Linux 5.8 x86_64 Oracle GoldenGate V11.1.1.0.0 for Oracle 11g on Linux x86-64.zip Oracle GoldenGate V11.1.1.0.0 For FlatFile on Linux 64-bit for OGG v11.1.1.

Detailed description of Oracle user Creation

Detailed description of Oracle user Creation 1. User conceptsThe user, that is, the user, is generally the "person" who accesses the Oracle database ". In Oracle, users can control various security parameters to maintain database security. These

ORA-21779: duration not active problem solution

ORA-21779: duration not active problem solution The user tells a RAC environment database to generate a large number of ORA-21799 error messages in the log, the alert Log part is truncated as follows: Mon Jan 06 10:27:24 2014Errors in file d: \

Correct usage of MySQL triggers

Correct usage of MySQL triggers I. Basic syntax for creating a trigger:Create trigger name BEFORE | after trigger event ON table name for each row trigger statementTrigger events include INSERT, UPDATE, and DELETE. MySQL trigger application

Preparations before installing Oracle 11g RAC in Linux

Preparations before installing Oracle 11g RAC in Linux Installation environmentOperating System: RHEL6.2 64bitOracle Database Version: 11.2.0.3Oracle Grid: 11.2.0.3 Software: RHEL6.2 64bit, linux_11gR2_grid, linux_11gR2_database Configure rac ip ----

Database ORA-00600 of a provincial telecommunications industry company [15160]

Database ORA-00600 of a provincial telecommunications industry company [15160] Systems: HP-UX B .11.31 RAC: YES Database Version: 10.2.0.4 1. Background : 39dbrac database Node 2, found a lot of ORA-600 errors in the alert Log, the analysis is the

Application of cursor and recursion in Oracle Functions

Application of cursor and recursion in Oracle Functions Most programmers may be familiar with recursion in code, but it is rare to write a recursive estimate in a stored procedure or function. Today, we have encountered an example of using recursion

Oracle Table Connection Method Analysis

Oracle Table Connection Method Analysis Basic table join knowledge: 1. Which table will drive the query (that is, the first table accessed )? When will no table be accessed during query based on the specified path? What are the optional driver paths?

Verify MySQL master-slave consistency (pt-table-checksum & amp; pt-table-sync)

Verify MySQL master-slave consistency (pt-table-checksum & pt-table-sync) Percona-toolkit-2.2.8-1.noarch.rpm has two tools to verify MySQL master-slave Data Consistency Installing tookkit requires some dependent packages Yum install perl-DBI

An example of ORA-00257 archiver error. error Solution

An example of ORA-00257 archiver error. error Solution An Oracle vulnerability is found here. For example: DELETE JEW_LOG WHERE C_ID IN (SELECT C_ID FROM BAS_BATCHNO WHERE C_WARID = '028' AND C_BATCHNOTYPE = 'P ') The subquery in this DELETE

Install MySQL in CentOS and use Navicat for MySQL in Windows

Install MySQL in CentOS and use Navicat for MySQL in WindowsInstall Check whether the installation has been performed:Yum list installed mysql *Rpm-qa | grep mysql * Check whether the installation package is available:Yum list mysql * Install the

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