mysql documentation

The following articles mainly introduce some minor knowledge about the time zone of PHP and MySQL databases. However, due to my temporary use of foreign space, there is always a problem with the time when I publish a Blog. Based on my previous

How can I sort MySQL query results? This is a question raised by many people. The following describes how to sort MySQL query results by a certain value. If you are interested, take a look. Previously, a function was modified, and MySQL query

Everything comes from an experiment. See the following example: Table:Copy codeThe Code is as follows:Create table if not exists 'foo '('A' int (10) unsigned not null AUTO_INCREMENT,'B' int (10) unsigned NOT NULL,'C' varchar (100) not null,Primary

MySQL performance tuning and Architecture Design-Chapter 1 Performance Design-MySQL Replication and replication Optimization Chapter 1 scalability design-MySQL Replication Preface: MySQL Replication is a unique feature of MySQL. It can completely

MySQL users and permissions, mysql user permissions I. Knowledge about MySQL permissions: 1. the MySQL permission system is mainly used to verify the user's operation permissions. 2. in MySQL, the permission information is stored in the granttable

MYSQL index and optimization details tutorial 1. what is an index? Indexes are used to quickly search for records with specific values. MySQLIndexes are saved as B-trees. If no index exists, MySQL must scan all the records of the entire table from

Accelerate MySQL index analysis and optimization for dynamic websites 1. what is index? Indexes are used to quickly search for records with specific values. all MySQL indexes are saved as B-trees. If no index exists, MySQL must scan all the records

Synchronous Asynchronous backup of two mysql databases: bitsCN.com 1. server statusServer A: 192.168.1.1Server B: 192.168.1.2 2. create a synchronization userHost domain A: 192.168.1.2 user name A: sync_a password A: aaaHost domain B: 192.168.1.1

Impact of type conversion on MySQL index selection bitsCN.com I encountered several cases where MySQL did not use the expected index. after reading some documents, I found that the impact of MySQL type conversion on index selection is not small. For

Mysql Procedure parameter is NULL problem analysis bitsCN.com An interesting thing was found during the recent writing process. Mysql procedure has its own unique processing method when passing parameters. For example, if the parameter is defined as

Basic concepts about MYSQL indexes: bitsCN.com 1. what is an index? Indexes are used to quickly search for records with specific values. all MySQL indexes are saved as B-trees. If no index exists, MySQL must scan all the records of the entire table

This article mainly introduces the implementation of MySQL nested transaction in PHP Two solutions, this paper analyzes the implementation of doctrine and laravel, and extract the analysis and summary, the need for friends can refer to the

MySQL Performance Optimization MySQL supports five different table types, which may be unusual. These five types are BDB, HEAP, ISAM, MERGE, and MyISAM. Among them, the BDB type belongs to one category separately, which is called "transaction-safe",

I encountered a problem in MySQL query today. The scenario is as follows: assume that one of my tables has a field scode (indicating the product number), and then one I encountered a problem in MySQL query today. The scenario is as follows: assume

ModSecurity is an engine for intrusion detection and prevention. It is mainly used for Web applications and can also be called Web application firewall. it can be run as a module or a separate application of the Apache Web server. ModSecurity aims

Official documents:http://www.mchange.com/projects/c3p0/index.html3 --30 --1000 --falseProperty Preferredtestquery will be ignored. You cannot do anything on this test sheet, it will be for C3P0 testing onlyUse. Default:null-->TestReserved and

Official Document: http://www.mchange.com/projects/c3p0/index.htmldefault-config>3301000false-->falseC3P0 will build an empty table named Test and test it with its own query statement. If this parameter is defined, then the attribute

All from an experiment, consider the following example: Table:Copy the Code code as follows:CREATE TABLE IF not EXISTS ' foo ' (' A ' int (ten) unsigned not NULL auto_increment,' B ' int (ten) unsigned not NULL,' C ' varchar (+) not NULL,PRIMARY

Three major APIs for connecting php to the MySQL database server: mysql, mysqli, and pdo. Overview this section briefly introduces the options available when you need to interact with the Mysql database during PHP application development. What is

Preface In global sharing, MySQL instance (mysqld process) and underlying storage engine are used to store various global operations and shared temporary storage information, such as query cache for query cache, cache the thread cache of the