Now more and more friends are using Ubuntu, including I have replaced Windows from the very beginning as my only desktop system, and it is working with Oracle, which is used by the company, oracle has many auxiliary tools in windows, while linux ~~
By default, mysql is installed on Ubuntu with the character set latin1.
1. View character set support
Show character set;
2. View character set variables
Show variables like "character_set % ";
3. Set the default Character Set
To solve garbled
After installing the Oracle database in Linux, I tried to use dbstart to start the database but did not respond. In this case, I need to change the oracle configuration.
Su rootVi/etc/oratab*:/Opt/oracle/product/9.2.0.4: NEgo:/opt/oracle/product/9.2.
Summarize the causes of the problem:
When I install snort, The./configure -- with-mysql = DIR path indicates a problem. My system has installed mysql
So when I reinstall it, I directly./configure -- with-mysql, and uninstall the snort before the
1. Download the four required rpm installation packages from the mysql website (which must be downloaded from the official website to prevent data modification and expires
I encountered the following problems when testing MySQL cluster. Please help me analyze what is going on. My mysql clusterdeployment uses the mysql-cluster-gpl-6.2.15-linux-i686-glibc23.tar.gz tar package.Node Manager: 192.168.5.254Storage Node192.16
PhpMyAdmin is a PHP-based MySQL database management tool based on the Web-Base architecture on the website host.You can manage the entire MySQL Server (requires a Super User) or a single database. To implement the latter, You need to properly set
In some cases, the stored procedure in Oracle becomes invalid. A Red Cross is displayed in the upper left corner of the stored procedure icon in PL/SQL Developer. For example, if the objects referenced in the stored procedure are invalid, dblink may
In Linux, MySQL5.1 installed with packages does not support GBK encoding. It only supports UTF8 encoding. Specific performance:
When you open a database encoded with GBK, the following message is displayed:
ERROR 1273 (HY000): Unknown collation
Generally, we will use the memory of the Oracle instance to 80%-60% of the physical memory of the system (4G memory or above uses more than 80%, 2g memory uses 60%-70%)S = pga + sga_max_size = 80% memory)Db_cache_size = 60% sgaShared_pool_size = sga_
An error occurs after lock_sga is set in Linux:
Ora-27102: Out Of Memory: Linux Error: 12: Cannot Allocate Memory with LOCK_SGA = TRUE[Oracle @ db ~] $ Ulimit-Core file size (blocks,-c) 0Data seg size (kbytes,-d) unlimitedFile size (blocks,-f)
In order to securely set the Linux MySQL root permission, the Administrator account is not added after the setting .. Instead, I started to toss the database. There are many users in it, and the method of re-installation is not feasible .. Finally
Generally, after Oracle software is installed, Oracle will be patched before the database is created. Of course, it doesn't matter if the database is not installed. Next we will introduce the upgrade process of Oracle after the database is created,
For data replication at the database TABLE level, the most common method is create table as (CTAS. In fact, the copy command under SQL * Plus can do the same job, and it is better, and the performance is also better. What's more, data replication
Many people know that LOGMNR is used to analyze logs, but few use DUMP to analyze logs. This is because the information analyzed by LOGMNR is easy to read and understand.
But sometimes we still need to DUMP to analyze the log file, because it
(I) Preface
In order to cope with opportunities and challenges of the wireless Internet, and to avoid problems caused by emoji,
We recommend that you use the utf8mb4 character set in advance for MySQL databases involving wireless connection.
This
Mysqlslap is a mysql testing tool started with mysql 5.1.4.
[Root @ www.bkjia.com ~] # Mysqlslap -- helpMysqlslap Ver 1.0 Distrib 5.5.31, for Linux (x86_64)Copyright (c) 2005,201 3, Oracle and/or its affiliates. All rights reserved. Oracle is a
Lab environment: OEL + Oracle11.2.0.3 + physical standby
As we all know, Data Guard is already the mainstream disaster tolerance solution of today's standards. Due to its strong adaptability to the network, it can adopt synchronous real-time
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