MySQL

Install MySQL Latest version 56install mysql 1 Start errorben:~ soul$ which mysql/usr/local/bin/mysqlben:~ soul$ mysqlERROR 2002 (HY000): Can‘t connect to local MySQL server through socket ‘/tmp/mysql.sock‘ (2SolutionsRunto the MySQL

MySQL is an open-source relational database management system of Oracle Company, which is widely used in small and medium-sized websites, is a cross-platform database management system, now describes how to install and configure MySQL on Ubuntu 14.04

$conn = mysql_connect ();Process language;No-process language;/*SqlDDL defineDML mainpulateDCL ControlInteracitve SQLembeded SQLSELECT User_name,ageFrom Tbl_userWHERE age>18Key words:CREATE TABLEDROP TABLEALTER TABLECREATE INDEXDROP INDEXCREATE

Method 1;Log in to MySQL, do set names latin1 first;The premise is that your created table is the (Engine=myisam DEFAULT charset=latin1) latin1 character set.If your watch is GBK, set names GBK;This method is temporary, that is, each time you log in

In the process of using MySQL, MySQL parameters are often set and adjusted as needed. As a PAAs version of Mysql,mysql Database on Azure has some limitations on parameter settings, and customers cannot modify system parameters like MySQL deployed

Rhel 6.5 + MySQL 5.6 compiled and installed.The installation process was smooth.--datadir=/data/project/db1/mysql/data--datadir=/data/project/db1/mysql/data--socket=/tmp/mysql.sockThe my.cnf file is placed in the /data/project/db1/mysql/data. Start

Http://www.rackspace.com/knowledge_center/article/mysql-resetting-a-lost-mysql-root-passwordMysql-resetting a lost MySQL root passwordThe MySQL root password allows full access to the MySQL database and allows for all actions to be undertaken

Create user Mysql>INSERT INTO Mysql.user (Host,user,password) VALUES ("localhost" ," Test ", Password (" 1234 "));added a username for test, password for 1234 users. However, the user can only log in locally, if you want to log on remotely, you

Organize your memo: To Add a field :ALTER TABLE table nameAdd column field FirstName type default after field name (after which field is added) Example: Alter Table Appstore_souapp_app_androidmarket ADD column varchar (+) default NULL After

Optimization of Max ()For example: Explain select Max (' Payment_date ') from payment; The number of rows that can be viewed to row is very much, which means that the entire table is scanned.Add an index to payment_date.CREATE INDEX Idx_payment on

First, check the location of the log:MySQL log file I believe that everyone has a lot of understanding, MySQL log file is generally in:/var/log/mysqld.log, below teaches you to modify the MySQL log file location method, for your reference.Today need

1.select Distinct (date_format (updatetime, '%y-%m ')) as UpdateTime from barcode where pid!=0 order by updatetimeDistinct () Action: Only one of the repeating values is selectedDate_format () function: Specify the date format of the output; Usage:

　Mysql> drop database if exists Jianghu; Create a new database, if it exists, after deletion;Query OK, 0 rows affected, 1 Warning (0.00 sec)mysql> CREATE DATABASE Jianghu;Query OK, 1 row Affected (0.00 sec)mysql> show databases; Display database

MySQL 5.5 (5.6) Later, need to compile with cmake (cross make, https://cmake.org/)My environment is as follows:　　　　VMware virtual machine, CentOS 5.5 x86_64 (kernel: 2.6.18-194.el5), SECURECRT clientFirst step: Install the development

MySQL failed to open Filemysql failed to open file '/usr/xxx/fff.sql 'A problem, when using the source command to import data under Linux, reportERROR:Failed to open file '/data/xxx/fff.sql ', error:2Ii. Solutions(First remember to use the database

The backup of the database is an extremely important thing. If you do not have a backup, you will be crazy if you encounter the following conditions:UPDATE or DELETE whitout where ...Table was DROPPed accidentally ...INNODB was corrupt ...Entire

1, write the monitoring master-slave shell script check_mysql_replication.sh, put under/etc/zabbix/#!/bin/bash/usr/bin/mysql-uzabbix-p password-e ' show slave status\g ' |grep-e "slave_io_running| Slave_sql_running "|awk ' {print $} ' |grep-c Yes2.

MySQL backup and recoveryNote: The backup is not successful because the version may not be the same, you need to execute the command #cp/usr/local/mysql/bin/mysqldump|mysqlhotcop|mysqlimport/usr/local/bin/(1) mysqldump Backup toolBack up the tables

Database-related source code analysis over the past year. Previous time Analysis LEVELDB implementation and BEANSDB implementation, database network analysis These two articles are very many. They are also more deeply comparative analysis, so there

For me who has been using Oracle, today is very surprised, MySQL in the same function at different orders of magnitude of performance incredibly large.First Look at Table ibmng (id,title,info) Unique ID key index titleLet's take a look at two