MySQL

Problem description: ProgramAfter the master database is updated, the data queried from the slave database does not change. It is suspected that the synchronization delay of the Master/Slave database is caused. Check the master-slave

Step 1 Yum update Wget http://dl.iuscommunity.org/pub/ius/stable/Redhat/5/x86_64/epel-release-5-4.noarch.rpm Wget http://dl.iuscommunity.org/pub/ius/stable/Redhat/5/x86_64/ius-release-1.0-10.ius.el5.noarch.rpm Rpm-uvh epel-release-5-4.noarch.rpm

Although count (*) and count (COL) may have different performance under different circumstances. However, in general, count (*) performs an index scan on the primary key, which counts the total number of records that meet the requirements in the

1. Create a centos MySQL user group [Root @ localhost ~] # Grep MySQL/etc/group # QuerySystemMySQL user group. If no user group exists, add it. [Root @ localhost ~] # Groupadd MySQL # Add a user group named MySQL 2. Create a centos MySQL user [

After installing apache2 + PhP5, I want to install mysql5 again.After installing mysql5 with the source code, I found that I wanted to add new extensions for PHP in Linux. Unlike in windows, I just needed to remove the semicolon comment ~I found a

MySQL got stuck for a long time when loading data local infile. At first, it thought the file was too large, causing MySQL to be suspended. Check the size of the imported file. The maximum size is dozens of MB. There is no reason why MySQL will be

# ********** First test, procedure **********# Use testprocedure; Delimiter // Create procedure simpleproce1 (Out par1 INT)BeginSelect count (*) into par1 from proce;End// Delimiter;Call simpleproce1 (@ ); Select @; # only one row can be retrieved

    Http://spaces.91book.cn/2627/spacelist_type_blog.html I. Introduction==========This document describes how to install and configure a MySQL cluster based on two servers. MySQL can continue to run when any server encounters a problem or goes down.

Take utf8 as an example. Assume that you have followed the instructions in my previous blog to install MySQL and the installation is successful. 1. Stop MySQL Sudo/etc/init. d/MySQL. server stop 2. modify my. CNF Sudo gedit/etc/My. CNF Find the

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Q: How to install lamp (Linux + Apache + MySQL + PHP)A: [url] http://www.freelamp.com/1003235699/index_html#/url] Q: How to install MySQL using rpmA: First download the appropriate RPM package, such as downloading the file MySQL-5.0.15-0.i386.rpmUse

MySQL includes a server process for database management and a series of tools for accessing databases and creating applications: MySQL: Execute SQL queries in MySQL, or execute SQL commands stored in files;Mysqlaccess: Manage Users;Mysqladmin:

I,Create a table:Create Table 'flower '('Id' int (11) not null auto_increment,'Color' varchar (255) default null,Primary Key ('id ')) Engine = InnoDB auto_increment = 6 default charset = Latin1Insert the following data:1 blue2 red3 blue4 red5

From: http://www.gosoa.com.cn/php-mysql%E4%BA%8B%E5%8A%A1%E8%AF%A6%E8%A7%A3 Before talking about PhP MySQL transactions, You can first understand the differences between PHP MySQL and mysqli. First, both functions are used to process

Install MySQL Sudo apt-Get install mysql-Server This should be very simple, and I don't think there is much problem with the installation, so I will not talk about it much. Let's talk about the configuration below. Configure MySQL Note: In ubuntu,

1. view the default execution parameters of MySQL command line client. Method: Start-> All Programs-> mysql-> MySQLServer5.5-> mysql5.5 command line client, right-click Properties. 2. copy the file as follows:"G: \ Program Files \ mysql server 5.5 \

/* This is basically the Database Class I use */// Block undefined errorsError_reporting (7 ); Class db_mysql { VaR $ servername = "localhost ";VaR $ dbname = "DBASE ";VaR $ dbusername = "root ";VaR $ dbpassword = "";VaR $ conn = 0;VaR $

In each step, create a user name and password on the MySQL slave server database, and only grant the replication Client permission. Step 2: Create the script check-mysql-slave on the monitored MySQL slave server #! /Bin/shDeclare-A slave_isSlave_is =

Same Display The display format of the timestamp column is the same as that of the datetime column. In other words, the display width is fixed to 19 characters and the format is YYYY-MM-DD hh: mm: Ss. Different Range Datetime retrieves and displays

  --------------------------------------------- I don't know how other people can judge it. I usually check whether there is a MySQL folder under var/lib. -------------------------------------------     1. Start the MySQL Service Run/etc/init.