MySQL

(1) Port detection# Netstat-lntup |grep 3306|wc-l1#1表示mysql已开启, 0 means close#!/bin/bashPort= ' Netstat-intup |grep 3306|wc-l 'If [$port-ne 1 ]Then/etc/init.d/mysqld startElseecho "Mysql is running"Fi(2) Whether the MySQL version is

1, add skip-grant-tables at the end of/ETC/MY.CNF, save, skip authentication.2. Restart MySQL to make the configuration you just modified take effect.3, terminal input MySQL, and then enter use MySQL;4, terminal input Update mysql.user set

Data types in MySQLMySQL has three major classes of data types, number, date \ Time, string, and more detailed sub-types in the three categories: Number Type integers: tinyint, smallint, mediumint, int, bigint Floating-point

192.168.139.8 as Nfs-server, 192.168.139.2 and 192.168.13.4 are used to install MySQL___________________________________________________________________________________________ the following operations on 192.168.139.8[[email protected] ~]# fdisk-l//

Java and MySQL call code Focus recordsUsing development tools: IdeaUse platform: Ubuntu 14.10Java sectionJDBC driver name and database urlstatic final string jdbc_driver = "Com.mysql.jdbc.Driver"; static final String db_url = "Jdbc:mysql://lo

MySQL encoding settingsmysql> SHOW VARIABLES like ' character_set_% ';+--------------------------+----------------------------+| variable_name | Value |+--------------------------+----------------------------+| character_set_client | Latin1 ||

There are two MySQL servers in the company from the synchronization, one day Nagios sent to alarm SMS,Mysqla are down ...Hurriedly contact the room, the room of the person feedback to the information isHARDWARE ERRORAfter the information is omitted,

Brief introduction:When the data volume is large, the MySQL Slave node is added using Innobackupex backup data.Install Innobackupex tool, I wrote here once: http://www.cnblogs.com/wangxiaoqiangs/p/5961413.htmlScene: E, D, C , A- B First,

1. Write shell scripts for each of them put into/ETC/INIT.D, add service servicesMySQL: A previous blog post has explainedPHP-FPM:#!/bin/sh# chkconfig:2345 Ten - //These two sentences do not write add initiator failed# description:php-FPM//These

After opening the terminal input:/usr/local/mysql/bin/mysql-u root–pThen enter the password:* * *Creating a database: Create databases work;Using the current database: use work;Creates a table: Create TABLE work (name char, sec char (x), age

Problem descriptionWIN10 64-bit Enterprise Edition;MySQL5.6 64-bit;Temporarily deploy a system in this machine, need to use MySQL, found that the Windows service can not find the MySQL service, the original configuration of the GUI and the

Recently to some students asked me some of the relevant knowledge of the business, under high concurrency, what is the performance impact of the transaction? Will there be a problem with clogging? How MySQL handles these ..... Suddenly I remember

Add the Settings node Connectionlifetime (in seconds) to the connection string. Exceeding the set connection session will be killed! Connection Lifetime, connectionlifetime 0 When a connection was returned to the pool, its

The current version of the company's system uses a large number of stored procedures, some complex process, a keynote user may invoke up to dozens of other small business logic and judgment, do not say it is unreasonable, in mainland China, at least

Slow SQL consumes 70%~90% database CPU resources; SQL statement is independent of the program design logic, compared to the program source code optimization, the optimization of SQL statements in the cost of time and risk is very low; SQL

Mysqldump is commonly used in MySQL database logical backups.1. Various usage instructionsA. The simplest usage:Mysqldump-uroot-ppassword [database name] > [dump file]The above command backs up the specified database to a dump file (dump file), such

Always want to analyze the source of MySQL, at the beginning do not know where to start, first from the CSV file storage start it, this is relatively simple. I am using the mysql5.7.16 version of the source code.CSV source files in the MySQL source

I. Creating a database tableRun database: Docker restart Local-mysqlCreating a Employees database table with a MySQL clientTable Name: EmployeesId:int (11) primary key, auto incrementName:varchar (32)Lastname:varchar (32)Ii. Modification of

MYSQL database function set I. mathematical functionsABS (x) returns the absolute value of x.BIN (x) returns the binary value of x (OCT returns octal, HEX returns hexadecimal) CEILING (x) returns the smallest integer greater than x. EXP (x) returns

Mysql 5.6.13 installation-free configuration method details, mysql5.6.13 This article will record the configuration of mysql without installation in the previous project. Today, I will share my configuration method with the help house platform for