MySQL

Method OneOpen the My.ini of the MySQL tutorial installation directory, adding default-character-set= in [client] and [mysqld] respectively gb2312When you create a new table, select character set and collation as gb2312 and Gb2312_chinese_ci

In many cases, a temporary table is required to combine the distinct of an order by. Note that because distinct may use GROUP BY, you must be aware of how the MySQL tutorial uses the columns in the order BY or HAVING clause of a part of the

MySQL Tutorial ' reading initial communication packet ' error resolution This problem occurs when the server suddenly turns off the problem.The error message is: Unable to link the database tutorial (MySQL) server, please check the server address,

. Linux to start the MySQL tutorial command:Mysqladmin start/ect/init.d/mysql Start (Previous installation path for MySQL) 2.linux Restart MySQL command:Mysqladmin restart/ect/init.d/mysql Restart (previous installation path for MySQL) 3.linux

The meaning of the limit 10000,20 scan satisfies the condition of 10020 lines, throw away the preceding 10000 lines, return the last 20 lines, the problem is here, if it is limit 100000,100, need to scan 100100 rows, in a high concurrent application,

To modify the My.ini file under the MySQL Tutorial Server installation directory, add the following line to the Mysqld section set-variable=lower_case_table_names=0 (0: Case sensitive 1: Case insensitive) finally restart the MySQL service.

MySQL Tutorial SQL determines whether a string exists in another string Locate (Substr,str,pos) Returns the substring substr the first occurrence of the string str, if SUBSTR is not inside STR, returns 0. Mysql> Select locate (' Bar ', '

How to add a new user to your MySQL tutorial database tutorialThis article is mainly about how to add new users to your MySQL database oh, because a MySQL may have a lot of databases we want to give each different database open permissions, open the

MySQL Tutorial stored procedure syntax Variable definition: Declare variable_name [, variable_name ...] datatype [default value]; Where datatype is the data type for MySQL, such as: int, float, date, varchar (length) Cases: DECLARE l_int int

Because the database is relatively large, it may be about 10 GB of data. Therefore, phpmyadmin is basically unavailable. It is too slow and time-out. This is basically unnecessary.First, you need to log on to SSH. Then use the following commandThis

After MySQL is installed in the morning, the following error is reported during startup:Starting MySQL. Manager of pid-file quit without updating file. [FAILED]I tried various methods found by Gu Jie in sequence, and found that you only need to

After painstaking efforts, I want to review the MySQL master-slave architecture. Although I started the VM, I started two previously installed virtual machines, one CentOS6 and the other Ubuntu. Both of them have installed the MySQL database, no

Description:I create a empty table and then alter this table's "AUTO_INCREMENT" starts from 10000000. after a long time, MySQL lost "AUTO_INCREMENT" definition when I show this table again. mariaDB has the same problem but Percona Server is fine.$

Why upgrade?Recently, because the database of the business side supports utf8mb4, the datax synchronization tool is still on the support for utf8 character sets. As a result, some synchronization tasks cannot correctly synchronize emoticon fields

When MySQL uses the row format and the default binlog_row_image = full, the binlog records the complete data image before and after the update. Therefore, it is feasible to perform the undo operation based on the binlog in the row format. I tried

The Replication function of MySQL can automatically synchronize updates from the primary MySQL server to several secondary MySQL servers. This function can distribute MySQL data to multiple machines in real time and submit the data security of MySQL.

Integration with MySQL in PHPIntegration with MySQL in flash and PHPBy Ben Smith, a. k. a Ω mega: May 12, 2005This tutorial teaches you how to integrate flash, PHP, and MySQL. We will learn how to parse text into HTML text from external script files.

MySQL 5.7 GA version is released, which means that MySQL 5.7 can be used in the production environment from now on. The official team will fix any problems immediately.Main features of MySQL 5.7:Better performance: it provides better optimization

1: Download: The current mysql version has reached 5.6.12Download Address: http://dev.mysql.com/downloads/mysql/Select "Source Code" and find a (mysql-5.6.12.tar.gz) at the bottom to Download wget.2: necessary software packages The code is as