MySQL

MySQL 5.1 supports triggers as well as custom function interface (UDF) features, and can implement memcache Automatic Updates if combined with Libmemcache and memcached functions for MySQL. Simply record the installation test steps. Installation

For most applications, MySQL is the most critical data storage center, so how to let MySQL provide ha services, we have to face a problem. When Master is in the machine, how do we ensure that the data as far as possible, how to ensure the rapid

I wonder if anyone has ever had such a disgusting problem: Two tables connection query and limit,sql efficiency is very high, but add order by after, the execution time of the statement becomes huge, the efficiency is very low. The situation is the

MySQL does not allow a select from back to the table to be used as an update, which is sometimes tangled. There is, of course, a better way than creating endless temporary tables. This article explains how to update a table and use a select in a

This example describes a method that Php+mysql counts the number of records in each table in the library and in descending order. Share to everyone for your reference, specific as follows: This is a simple piece of code that enables you to count

#!/bin/bash #this is a script of MySQL backup if [!-d/mydata/data1/backup]; then mkdir/mydata/data1/backup fi CD /mydata/data1/backup file=$ (find.-type f-mtime-7 | grep. *all.sql) #查找7天内是否有备份的文件 echo $file if [-Z $file]; then echo "Backup all

Overview Log files are an important part of the MySQL database. MySQL has several different log files, usually including error log files, binary logs, common logs, slow query logs, and so on. These logs can help us locate events within MYSQLD,

I. Preface: Version information: okphp BBS v1.3 Open source version Because of PHP and MySQL itself, php+mysql injection is more difficult than the ASP, especially in the injection of the structure of the statement is a difficult, this article is

Mysqladmin is an important client of MySQL, the most common is to use it to close the database, in addition to this command can also understand the running state of MySQL, process information, process killing and so on. This article describes how to

Write it down before you can find it again! When PHP operates the database, the data in the database uses UTF8 encoding, and when it is read out, it shows all the??????? The question mark garbled, looked for some data originally is before reads

This article simply narrates the application instance of the Full-text index, the MySQL demo version 5.5.24.Q: What are the applications for Full-text indexing?A: Full-text indexing is the key technology to achieve large data search at present.For

Profiling is a very useful MySQL performance analysis tool, today to test the profiling function. Thanks for the blog with Love Rose: The main purpose of the MySQL SQL Performance Analyzer is to show the usage of resources throughout the process of

The easiest way to export table data to a text file is to use the Select ... The query results into the OUTFILE statement are exported directly to a file on the server host.Select for export Data ... into outfile declaration: The syntax of this

I guess everyone in the command line operation MySQL will be very worried about the operation of the database now, at least I have struggled, you may say that I do not know the command, yes this is indeed possible.But today we are introducing a good

1, selecting the most applicable field properties MySQL can support large amount of data access, but generally speaking, the smaller the table in the database, the faster the query executed on it. Therefore, in order to achieve better performance

1. Preparatory work (1) PHP version 5.6.17 download address PHP website Cloud habitat Download address (2) Nginx version 1.8.0 download address Nginx website Cloud Habitat download address (3) MySQL version 5.7.10 MySQL website cloud habitat

Written in the front: discuz! as a leading community system, for the majority of webmasters to provide a one-stop web site solutions, but also open source (although part of the code is encrypted), it for the vertical field of the industry has made a

SQL injection statements sometimes use the substitution query technology, that is, let the original query statements can not find the results of errors, and let the query to build their own execution, and the implementation of the results instead of

First, let's look at a formula where the memory in MySQL is divided into global memory and thread memory (in fact not all, just the larger part): Copy Code code as follows: Per_thread_buffers=

First we need to know the following SQL statement to query MySQL database/table related information: Copy Code code as follows: Show DATABASES//list MySQL Server database. Show table [from db_name]//list database datasheet. Show CREATE