MySQL

In general, MySQL will provide a variety of storage engines by default, which you can view by:See what storage engine your MySQL has now provided:Mysql> show engines;Look at your MySQL current default storage engine:Mysql> Show variables like

Log operation is one of the most important means of database maintenance, log files will record the various information of MySQL server, so when the MySQL server was accidentally damaged, not only can the log file to see the cause of the error, but

ALTER Table Statement to add, modify, or delete columns in an existing table1.ADD [Column] column name (column definitions) [first or after column_name]Adds a column and can specify that the column be added before or after a column name (column_name)

It is estimated that most of the friends who start contacting MySQL will have this problem: what does the value in int (M) mean?According to the relevant information summarized below:Int (M) ZerofillPlusZerofillAfterMShow a little bit of effect,

In MySQL, a row-level lock is not a direct lock record, but a lock index. Indexes are primary key index and non-primary key index Two, if a SQL statement operation primary Key index, MySQL will lock the primary key index, if a statement operation

今天编写使用C语言调用mysql数据库编程实战以及技巧，为其他IT同行作为参考，当然有错误可以留言，共同学习。First, the MySQL database C language Common interface API1. First of all, the link database Mysql_real_connect, the prototype is as follows:MYSQL * stdcall Mysql_real_connect (MYSQL *mysql,

function keyword functionsA recursive function that contains statements that call itself directly or indirectlyInclude,require loading a function library file into a script programUse special pointers in the $this classAccess or operation in class, $

First, we create a comma-delimited string. CREATE TABLE Test (id int (6) NOT NULL auto_increment,primary KEY (ID), pname varchar (a) not null,pnum varchar (a) NOT null) Then insert a comma-delimited test data insert into Test (pname,pnum) VALUES ('

Ubuntu Build (Apache+php+mysql) +phpmyadminUbuntu Build Apache+php+mysqlBasic Support environment. Zend optimizations are not applied for the time being, so there is no Zend Optimizer installation involved. In fact, installing in Ubuntu is much

First look at the question:[Email protected] ~]# Innobackupex--user=root--password=131417/backupInnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, Innobase Oyand Percona LLC and/or its affiliates 2009-2013. All rights Reserved.This software is

BackgroundOne of the DBA's daily work must be a DDL change, a DDL change that locks the table, which can be said to be a perpetual pain in the DBA's mind, especially when a DDL change is performed, causing a large number of threads on the library to

http://258xiaolei-sina-com.iteye.com/blog/764665Start MySQL with parameter--log-slow-queries to record SQL execution time of more than long_query_time secondsMySQL comes with slow log analysis tool Mysqldumpslow.Slow log is a file written by MySQL

Note the point:(1) The total table name for the split is different, so create a temporary table, and the data for the gross position table is inserted into the temporary table first(2) In order to avoid the end of the outermost cursor polling data,

1. Install MySQLcd/usr/local/src/No installation of compiled binary packageswget http://syslab.comsenz.com/downloads/linux/mysql-5.1.40-linux-i686-icc-glibc23.tar.gzTar zxvf/usr/local/src/mysql-5.1.40-linux-i686-icc-glibc23.tar.gz DecompressionMV

Reprint: http://blog.csdn.net/superchanon/article/details/8546254/1. Operating platform: CentOS 6.3 x86_64, basically equivalent to Rhel 6.32. Installation Method:There are two main ways to install MySQL: one is self-compiling through the source of

Method 1.Start MySQL service sudo/library/startupitems/mysqlcom/mysqlcom start stop MySQL service sudo/library/startupitems/mysqlcom/mysqlcom Stop restart MySQL service sudo/library/startupitems/mysqlcom/mysqlcom restart//----------------------------

This article is from: http://www.lai18.com/content/433951.html This example describes how PHP uses MySQL to save session sessions. Share to everyone for your reference. The specific analysis is as follows: in many large systems generally have this

has been studying the use of Zabbix monitoring MySQL database, due to the Zabbix official template support monitoring MySQL, but the direct use of the template is not available, need to do some settings to be able to use. If your monitoring

Open binary log (binary log content: Change the operation of the database)In the/ETC/MYSQL/MY.CNFRemove the comment from the Log_bin line to open the following is the saved pathThe following expire_logs_days is how long, MySQL automatically deletes

MySQL Beginner usage Guide and introduction One, connect MySQL Format: mysql-h host address-u user name-P user Password1. Example 1: Connect to MySQL on this machine.First open the DOS window, and then enter the directory Mysqlbin, and