engine myisam

Table technology (the structure of the table can not be changed) sub-table technology has (horizontal and vertical division) when a bigger and larger, even if the index is slow, we can use the table to QQ user table to specify the operation of the

Mysql optimization and mysql Performance Optimization For a data-centric application, the quality of the database directly affects the performance of the program, so the database performance is crucial. I To ensure database efficiency, do the

This article describes how to use the UPDATE statement in MySQL, including the analysis of performance problems that are easily caused by UPDATE. For more information, see I. common UPDATE usageFirst, establish a test environment: DROP TABLE IF

How to disable the innodb engine in mysql5.5 and mysq5.6 today we found that a backup mysql data folder has become abnormal. I found three more files: ibdata1 ib_logfile0 ib_logfile1, the former 18 m, the last two 5 MB data were migrated from mysql5.

When mysql processes a unique index, it updates the index. If it does not exist, it should be very common to insert the index. There are many similar articles on the Internet, today I will talk about the problems and methods that may occur when this

Take MySql as an example. Create two data tables in the MySQL database and insert some data respectively. The example script is as follows: droptabletable1; CREATETABLE 'Andrew '. 'table1' ('name' VARCHAR (32) NOTNULL, 'city' VARCHAR (32) NOTNULL)

The following articles mainly introduce MySQL stress testing tools. We all know that the application rate of MySQL databases is not low in practice, and MySQL databases are generally used in small and medium-sized enterprises, the following articles

1. Introduction to data enginesInMySQL5.1, MySQL AB introduced a new plug-in storage engine architecture, allowing the storage engine to be loaded into the new MySQL server being migrated.Use the MySQL plug-in storage engine architecture to

Mysql merge TABLE sharding: www.2cto.com create table 'test _ 1' (id INT (11) not null default '0', email varchar (50) not null, primary key ('id') ENGINE = MyISAM default charset = UTF8; create table 'test _ 2' (id INT (11) not null default '0 ',

If mysql processes an index, it is updated. If there is no index, it is inserted (multiple columns of unique indexes). If there is no index, It is very common to insert the index, there are many similar articles on the Internet. Today I will talk

The MySQL table type and storage engine version are inconsistent. The old version of mysql client Navicate 8 is used, and the mysql server uses the version of mysql5.6. The version is incorrect when the engine version is modified; Mysql error 'Type =

The following articles mainly introduce MySQL stress testing tools. We all know that the application rate of MySQL databases is not low in practice, and MySQL databases are generally used in small and medium-sized enterprises, the following articles

Xin Xing talks about data fragmentation in mysql and operations under MyISAM Engine Data fragmentation in mysql is closely related to data deletion. When deleting data, it will inevitably lead to discontinuous blank space in the data file. for

This article mainly introduces the ThinkPHP permission authentication Auth instance. if you need it, you can refer to the following example code to thoroughly analyze the implementation principles and methods of ThinkPHP permission authentication

Mysql partition experiment Overview: 1. create partitions based on the partition type 2. manage partitions 3. partition and unpartitioned table example 1. create partitions using hash partitions as an example (1) non-linear hash partition 1. Test

Because of the company's product needs, now to implement a function, table A put the user's basic information, table B saved a table of the user's behavior, table C and table B the same nature. When asked to query the time can be in B or C table in

Sysbench is a modular, cross-platform, multi-threaded benchmarking tool designed to evaluate the load of databases under different system parameters .This includes testing in several ways:1. CPU Performance2. Disk IO performance3. Scheduling Program

first, the next order preparation: Build table:Order Information table: Store the main order informationOrder ID, ID of the logged in user, total amount of the order, information of the consignee of the order1 123 400 LiangAn association table for

No nonsense, directly to everyone to paste the code, the code is very simple, are more common SQL statements, the specific content please see below. CREATE TABLE ' Test_avatar ' (' uid ' int (one) unsigned NOT null default ' 0 ', ' Avatar ' varchar

demo.php: Copy CodeThe code is as follows: /** * Read SQL file and write to database * @version 1.01 demo.php */ Class DBManager { var $dbHost = '; var $dbUser = '; var $dbPassword = '; var $dbSchema = '; function __construct ($host, $user,