MySQL

1. Installing NginxSOURCE InstallationI install the environment is Deepin (Ubuntu derivative version), so the simplest way is to executesudo Install Nginxor under CentOS:Yum Install NginxCompiling the installationhttp://nginx.org/Download the latest

keepalived mysql Failure auto-switch scriptThe MySQL schema is master-slave (master-slave), master failure is automatically switched to slave. Of course, can also be set to double master, but here is a disadvantage: when the main pressure is very

Create three table TB_LATIN1,TB_UTF8,TB_GBK, encoded as LATIN1/UTF8/GBKThe "Hello a" string is encoded as followsGBK:%c4%e3%ba%c3%61UTF-8:%e4%bd%a0%e5%a5%bd%61The test code is as followsPHP//fileencoding=gb2312mysql_query("Set Names

MySQL Utilities IntroductionMySQL Utilities provides a set of command-line tools for maintaining and managing MySQL servers, including: Administrative Tools (clone, copy, compare, diff, Export, import) Replication tools (Installation,

With the MySQL command line, you can make a backup of the database and restore, the following is a detailed method for you to use the MySQL command line to implement the function of the steps for your reference.MySQL command line export database:1.

MySQL log features detailed query, slow queryMySQL log: A large number of IO operations are not recommended to write to a fileMysql> show global variables like ' innodb% ';mysql> show global variables like '%log% '; General_log | OFF Log |

@MySQL get the current date time (and the conversion of the time)Localtimestamp () LocaltimestampThese date-time functions are equivalent to now (). Since the now () function is short and easy to remember, it is recommended that you always use now ()

1. Configure the root password for MySQLBy default, MySQL does not have a password and can be accessed directly:[Email protected] ~]# Mysql-urootBelow we set the root password:[Email protected] ~]# mysqladmin-uroot password ' 123456 'Enter the

1. Stop MySQL First/etc/init.d/mysqld stop2. Use--skip-grant-table to start MySQL, ignoring authorization login verification.Mysqld_safe--skip-grant-tables--user=mysql &Mysql-u root-p Hint: The--skip-grant-tables parameter is added at startup to

When using MySQL workbench for batch updates or deletions, the following error occurs:Error code:1175. You is using Safe update mode and you tried to update a table without a WHERE is uses a KEY column to disable safe mode , toggle the option in

Machine A--192.168.103.94--Server Machine B - -and 192.168.4.2--Client Machine A = Install Mysql-server, start; Use the root user login to see if DNS resolution is turned on, and execute the following command: Mysql> Show variables like '

What can MySQL do to remove spaces from a field character in bulk? Not only the space before and after the string, but also the space in the middle of the string, the answer is replace, using the MySQL self-contained replace function, plus a trim

We all know that in MySQL you can see the cost of checking the previous query through show status like ' Last_query_cost ', and it's the sum of the cost of Io_cost and Cpu_cost, It is often a common indicator of how efficiently we evaluate the

Since the previous time to test the performance of MySQL running on all-flash arrays, a period of time was studied, and two tools were tested: One is MySQL's own sql-bench, and the other is sysbench. The environment used in this procedure is Redhat

first, the principle of MySQL master and slave1. Replication ThreadMySQL's Replication is an asynchronous copy process (mysql5.1.7 above is divided into asynchronous and semi-synchronous modes), copied from one MySQL instace (what we call Master) to

Linux Operational Phase IV (IV) MySQL Lock, transaction 1. Related concepts:Connection Manager: Accept requests, establish secure connections, authenticate users, etc.Thread Manager: thread pool, threading reuse thread-reuse;Parser: Parse

A command is all done. sudo port install php55 php55-fpm php55-curl php55-exif php55-gd php55-gettext php55-iconv php55-mbstring php55-mcrypt php 55-mysql php55-memcache php55-odbc php55-opcache php55-openssl php55-oracle php55-postgresql

Order bySort by field value, default ascending (ASC). The collation rule determines the sort relationship.order by 字段 升序|降序（asc|desc）,Order by allows multiple fields to be sorted.Refers to the first field ordered, if not distinguished, the second

From:http://www.cnblogs.com/tae44/p/4682810.htmlExperimental system: CentOS 6.6_x86_64Lab Prerequisites: Prepare the build environment in advance, firewall and SELinux are offThe experiment shows that there are 2 hosts in this experiment, such as

When building a table with SQL statements at work, MySQL reported the following error:You have a error in your SQL syntax; Check the manual-corresponds to your MySQL server version for the right syntax-use-near ' Type=innodb ' on line 1Solution:This