MySQL

SELECT CONCAT (' Pr_ ', p.db, '. ', p.name) FileName, CONCAT (' Delimi ', ' TER $ $USE ', p.db, ' $ $DROP PROCEDURE IF EXISTS ', P.name, "$ $CREATE definer= ',", left (Definer, -1+locate (' @ ', definer)), "@", Right (Definer,length

Tcmalloc analysis of MySQL performance optimizationAuthor:echo Chen (Chenbin)Email:[email protected]blog:blog.csdn.net/chen19870707Date:october 10th, 2014Although the study found that Tcmalloc is not suitable for our existing game framework, but the

Here is an example analysisTable A records the following:AID Anum1 a200501112 a200501123 a200501134 a200501145 a20050115Table B records the following:BID bname1 20060324012 20060324023 20060324034 20060324048 2006032408Create these two table SQL

Single-Machine multi-instance is said to maximize the use of hardware, who know, but the previous company like this, I recently also learn to copy what, the computer can not afford two virtual machines, just a single multi-instance to rescue me. Let'

A common index of a database is typically a single field, and if multiple fields are combined, a composite index is formed. For a composite index, ifWhat happens when you make a conditional query on one of the fields?First, examplesMysql>Show CREATE

MySQL data cleanupDbname:mytestTable Features: my_table_test_20140701#!/bin/shDbname= "mytest"For month in ' seq-f%02g 1 7 ';d oMysql-h "$ip"-u-p $dbname-S-e "show tables like '%2014${month}% ';" >tablelist_${month}.txtSed-i '/tables_in_mytest/d

Recently, when using a stored procedure that uses a MySQL database, some problems have been identified, the database encoding is inconsistent with the table and field encodingCause a problem when running, error message: 1267-illegal mix of

The first step:Gedit/etc/mysql/my.cnf Found bind-address = 127.0.0.1Comment out this line, such as: #bind-address = 127.0.0.1or instead: Bind-address = 0.0.0.0Allow any IP access;Or specify an IP address yourself.Restart Mysql:sudo/etc/init.d/mysql

How to uninstall the CentOS system comes with MySQL1.1. find out if MySQL was previously installed Command: Rpm-qa|grep-i MySQLCan be seen as shown: (Pictures from the Internet, only for reference use)Description System comes with:Mysql-client-5.5.25

How to completely uninstall MySQL under CentOS? Solve the problem of uninstalling dirtySystem:CentOS 6.5,mysql:mysql 5.6The main solution here is to use rpm installation of the uninstall problem, installation method see: CentOS installation mysql*.

Database horizontal split and vertical split differences (MySQL for example)Database horizontal split and vertical split difference (MySQL for example) case: The simple shopping system is set up in the following table: 1. Product table (data volume 1

DAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0= Monday, 1 = Tuesday,...... 6=

physical Backup of database directory/var/lib/mysql every 3 days back up the data to the system/opt/dbbak directory#!/bin/bashDay= ' date+%y-%m-%d 'Size= ' Du-sh/var/lib/mysql 'Cd/opt/dbbak 2>/dev/null | | Mkdir/opt/dbbakecho "Date: $DAY"

One: Caching conditions, principleMySQL query cache is used to cache the SELECT statement we execute and the result set of the statement, and MySQL is similar to typical KV storage in the specific technical details of implementing the query cache,

MYSQL Learning Note III: Date and Time Functions1. Get the function of the current date and the function to get the current time/* Get the current date function and get the current time function, return the date in ' Yyyy-mm-dd ' or ' YYYYMMDD '

Open-source Mysql client for AndroidGithub address: https://github.com/enbandari/amysqlclient In the consistent style of love and nonsense, let's first explain why we should do this .. After a dog came back from practice, it was really not our style

Common commands for Mysql database backup and restoration, mysql Database Backup Common commands for backing up and restoring Mysql databases are the key to backing up and restoring Mysql databases. There are no commands and nothing can be done, let

Summary of InnoDB foreign key usage and InnoDB Key Usage USE 'wfc _ database'; # ALTER table 'app' ENGINE = INNODB for the master TABLE (also known as the referenced table, referenced TABLE, and outTable; # ALTER table 'app _ version' ENGINE =

Basic MySQL Data Table operation 3: comprehensive example 1. Create a database mysql> create database company;mysql> use company;  Ii. Create a table 1. Create an offices table mysql> create table offices -> ( -> officeCode int(10) NOT NULL

Master-MasterMySQL replication and installation configuration test  I. Architecture  Ii. Install Mysql server The following uses the configuration of DB1 (192.168.0.10) as an example. The configuration of DB2 is basically the same. You only need to