MySQL

150414 16:23:07 [ERROR] Plugin ‘InnoDB‘init function returned error.150414 16:23:07 [ERROR] Plugin ‘InnoDB‘ registration as a STORAGE ENGINE failed.150414 16:23:07 [ERROR] Unknown/unsupportedtable type: InnoDB150414 16:23:07 [ERROR] Aborting

Enterprise Face question 1: (production case): monitor MySQL master-slave synchronization is abnormal, if abnormal, send sms or mail to the administrator. Note: If there is no master-slave synchronization environment, you can use the following text

Incremental backup point-------------Error Delete point------------------------------"Recover dataThe data continues to be writtenSimulation1.full Back (3 rows) 3pm the day before the backup2,insert 3 rows 5pm next day new data3,delete from table

Proceed as planned today to convert the background database from Ms SQL Server2000 to MySQL5.1.3. The purpose is to facilitate the release of beta versions of the software.1. Drive: Mysql-connector-odbc-5.1.11-win32.msi. Test win7*64, XP passed.2.

command: show Processlist;if it is the root account, you can see the current connection for all users. If you are a normal account, you can only see the connection you are occupying. show Processlist; only the first 100 are listed, if you want to

MySQL grouping and aggregation functionsThere are 5 Mysql aggregation functions:1, COUNT () number of records (count (1), COUNT (*) Table rows, count (column name) statistics column non-null number)2, max () maximum value3, min () minimum value4,

I wrote an article about this before.Why does "original" use data indexing to improve efficiency? (This article provides an overview of MySQL) (update)This time, the main focus is on two common storage engines.We generally perform MySQL database

Replace the welcom to Cdb_pms table subject field with WelcomeCopy CodeThe code is as follows:UPDATE ' Cdb_pms 'SET ' Subject ' = REPLACE (' Subject ', ' Welcome to ', ' welcome ')WHERE INSTR (' Subject ', ' Welcome to ') > 0Replace the message

Indexing is the key to fast searching. MySQL indexing is important for the efficient operation of MySQL. Here are a few common types of MySQL indexes.In a database table, indexing a field can greatly improve query speed. Suppose we create a mytable

MySQL alter summary (reprint)1: Delete ColumnsALTER table "table name" DROP "column name"2: Add columnsALTER table "table name" ADD "column name" INT not NULL COMMENT ' comment description '3: Modify the column type informationALTER table "table

First step: Configure the backup directory code on the server:--------------------------------------------------------------------------------Mkdir/var/lib/mysqlbackupCd/var/lib/mysqlbackup-------------------------------------------------------------

Now most of the operations on the database (for example MySQL) are encapsulated into a class, as shown in the following example:1 namespaceTestdatabase2 { 3 Public enumDbstatuscode {all_ok, mysqlexcuteerr}4 Public classTestDB5 {6

The database has different storage and management methods for the same data, which is called the storage engine in MySQL.The common storage engine has myisam,innodb,memory,mysql default is InnoDB.MyISAM bulk insertion speed is faster than InnoDB,

today learn to connect MySQL database with PHP, write a blog summary.To use PHP to connect to the MySQL database, we will first connect to the database, we use the following function to connect$sql _link = mysql_connect ("hostname", "Login username",

Although the computer installed MySQL, but has not been how to study the problem of modifying the code, usually need to use Chinese characters, are used pinyin to replace, because it is doing some simple grammar exercises, so also did not pay much

Sometimes we need to uninstall MySQL and reinstall it for a variety of reasons, but because uninstallation does not completely cause a variety of problems during installation. So uninstall completely when uninstalling. A step that is completely

Disadvantages:Network segment not supportedSingle Thread# -*- coding: utf_8 -*-# date: 2015/5/13# author:sanrimport  Mysqldbimport osimport sysdef readme ():    print  ' + '  +  '-'  * 50 +  ' + '     print  ' \t            python mysql blasting '   

1. View Linux kernel version, System Information, commonly used in three ways:uname-a; more/etc/issue; Cat/proc/version;2. Check the Apache version information, if it is installed through Yum, or RPM, you can use the Rpm-qa |gerp httpd to view;Can

1.linux system, enter mysql mode command: mysql-u[user name]-pExample: Mysql-uroot-p (log in as root)2. View the number of connections show processlist;If you are logged in as the root user, you can see all connections. If you are a normal account,

Mysql remote Import and Export DatabaseFirst cd to D: \ wamp \ bin \ mysql \ mysql5.5.24 \ bin directory(Personal Experience: win + r-> cmd-> cd e: \ wamp \ bin \ mysql \ mysql5.5.24 \ bin-> e: -> mysqldump -- default-character-set =