MySQL

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I. Major changes from 4.0 to 4.1 If you created a InnoDB table containing timestamp fields in the MySQL tutorial 4.1.0 to version 4.1.3. You need to rebuild the table when upgrading to 4.1.4 and higher because the storage format has changedStrings

MySQL tutorial administrator pops up "could not find settings" error FIX: Just put the Hkey_local_machinesystemcurrentcontrolsetservicesmysqlimagepath in the registryThe value is changed from C:mysqlbinmysqld.exe MySQL to

MySQL Tutorial SQL distinct delete duplicate records How to use the DISTINCT keyword in MySQL to filter duplicate values in the result list of a SELECT statement If you want to delete duplicate data while querying the data, you can use the

MySQL Tutorial modify table/Field Add/Remove Table index CREATE TABLE Test (Blob_col blob, index (Blob_col (10)); in MySQL 5.1, for MyISAM and InnoDB tables, the prefix can be up to 1000 bytes long. Note that the prefix limit should be measured in

MySQL Tutorial master data synchronization Backup experience sharing Preparatory work:1, two machines (mine is WinXP IP 192.168.0.119 from the primary server Win2003 192.168.0.17 Primary server)2, in two machines installed MySQL Database tutorial

First, insert and replace The INSERT and replace statements have the ability to insert new data into a table. The syntax for these two statements is similar. The main difference between them is how to handle duplicate data. 1. General usage of

This article has a collection of three on how to open the MySQL tutorial remote connection, the first is a MySQL cmd command prompt to open remote connection to MySQL, method Three is to modify the MySQL My.ini file configuration to modify Oh.

MySQL Tutorial export database tutorials several ways Method One CMD to the MySQL Bin directory with the following command mysqldump--opt-h192.168.0.156-uusername-ppassword--skip-lock-tables databasename> Database.sql change IP to localhost. If it's

Operating system: WINDOWS-XP system Database tutorial version: MySQL Tutorial 5.x Tip:access denied for user ' root ' localhost ' using password yes/no Originally all good, today boot up to prompt the above error, restart MySQL or not. Note that

MySQL tutorial Creating stored Procedures"Pr_add" is a simple MySQL stored procedure that has two input parameters of type int, "A", "B", and returns the and of the two parameters. drop procedure if exists pr_add; --Calculate the sum of two

PHP File Upload function configuration mainly involves php.ini configuration file Upload_tmp_dir, Upload_max_filesize, post_max_size and other parameters, Nginx is client_max_body_size.1. Modify PHP configuration file (php.ini)①file_uploads = OnHTTP

MYSQL enable log[Root @ jianshe99] # whereis my. ini[Root @ jianshe99] # vi/etc/my. cnf[Mysqld]Datadir =/var/lib/mysqlSocket =/var/lib/mysql. sockUser = mysql# Default to using old password format for compatibility with mysql 3.x# Clients (those

1. Partition column index constraintsIf the table has a primary key or unique key, the partition column of the partition table must be included in the primary key or unique key list to ensure the efficiency of the primary key, otherwise, the same

Configure slow queryThe default my. cnf file is in the/etc/directory.Vim/etc/my. cnf# Slow_querySlow_query_log = 1 # enable slow querySlow_query_log_file =/var/lib/mysql/mysql-slow.log # set the slow query pathLong_query_time = 0.01 # set the slow

Define the exception capture type and handling method:DECLARE handler_action HANDLERFOR condition_value [, condition_value]...Statement      Handler_action:CONTINUE| EXIT| UNDO      Condition_value:Mysql_error_code| SQLSTATE [VALUE] sqlstate_value|

Some time ago, my work on the project was very busy. Recently, I have to make department adjustments to start a new project. I am very excited to learn a lot of new knowledge. I came back from work today and checked the VPS status. I found that the

$ Localhost = 'localhost'; // connect to the server. In most cases, use localhost,$ User = 'root'; // mysql logon account$ Upwd = '000000'; // logon password of the mysql server$ Db = 'DB'; // your mysql database  The code is as follows:Copy code

1. First, check the PHP configuration file php. ini.Open PHP under the php installation directory. in the ini file, Ctrl + F search for "php_mysql.dll" and delete ";" before "; extension = php_mysql.dll" to cancel comments, search for and modify the