storage engine

One, MySQL data type:1. Numeric Type:integer type: when using the unsigned modifier, only positive values are taken, the value is not sufficient to specify the width, and the left fill spaceInteger types include: Tinyint,smallint,int, etc. Float

1. What is a storage engine?The storage engine refers to the type of the table. The storage type of the database determines how the table is stored on the computer. Users can do this by notTo select the appropriate storage engine with the same

The storage engine for MySQL refers to the type of table. The storage engine of the database determines how the table is stored on the computer.First we can look at the storage engine supported by MySQL:mysql> show engines;+------------+---------+---

There may be scenarios where you need to change the table's storage engine, such as a table that stores logs if there are almost only inserts and a small number of select operations, it may be necessary to replace the storage engine with MyISAM for

Storage Enginerefers to the table type, which indicates the storage engine that is used when the table is created, different tables in the same library can use different storage engines, but it is recommended to use the same storage engineMySQL

Two kinds: MyISAM: ???????????? MyISAM is the default storage engine. Each myisam is stored as three files on disk, and each file name starts with the name of the table, and the extension indicates the file type.??????????? . frm file storage table

MyISAMthe default database engine before Mysql5.5 is most commonly used. High insertion, query speed, but no transaction supportInnoDBthe preferred engine for transactional databases, supporting ACID transactions, support row-level locking , MySQL 5.

I. Defining databases and instancesDatabase:A collection of physical operating system files or other forms of file types. The database file can be a file ending with frm, MYD, IBD.Conceptually, a database is a collection of files that are organized

MySQL5.5 later uses the InnoDB storage engine by default, where InnoDB and BDB provide transaction-safe tables, and other storage engines are non-transactional security tables.To modify the default engine, you can modify the Default-storage-engine

1. Index Organization table:In the InnoDB storage engine, tables are organized in the primary key order. Such a table of storage is called an indexed organization table, and each table has a primary key in the InnoDB storage engine table. Assuming

Storage Engine1, Concept: The database on the same data, has a different way of storage and management.2, MyISAM:1.the MyISAM table is operating system independent, which means that it can be easily ported from a Windows Server to a Linux Server

MySQL has two storage engines: InnoDB and MyISAM, and the following table is a simple comparison of the two engines MyISAM InnoDB The difference in composition: Each myisam is stored as three files on disk.

1. InnoDB Storage Engine OverviewThe InnoDB storage engine is the first MySQL storage engine to fully support acid transactions, characterized by row lock design, support for MVCC, support for foreign keys, consistent non-lock read, and design for

Features of several common storage enginesHere we focus on several common storage engines and compare the differences and recommended usage between each storage engine. features Myisam BDB Memory InnoDB

The following articles mainly introduce the differences between the MySQL storage engine (InnoDB) and MyISAM, including evaluation, evaluation, and related performance tests, the following is a detailed description of the article, hoping to help you

Install and uninstall mysql for Mysql5.1 plug-in storage engine BitsCN.com Mysql databases use a plug-in storage engine. if the storage engine has been installed on the Mysql server, you can also add or uninstall the storage engine. In Mysql5.1,

The TokuDB storage engine, which can be seen as an upgraded version of the ARCHIVE storage engine, has intensive compression and supports transactions. Compression ratio: EngineCompressionTablesize [MB] InnoDBnone2272InnoDBKEY The TokuDB storage

Differences between common storage engines of Beckham _ mysql and the storage engine of Beckham _ mysqlStorage engine differencesBrief:1. Storage Engine2. Differences between myisam and innodb   I. Storage Engine 1. What is a storage engine? In

Primary Key of the InnoDB Storage engine table In the InnoDB Storage engine, tables are organized and stored in the order of primary keys. In an InnoDB Storage engine table, each table has a primary key. If the primary key is not explicitly defined

MySQL kernel InnoDB Storage engine (Volume 1) notes, mysqlinnodbMySQL kernel InnoDB Storage engine (Volume 1) Directory 1 Overview 2. Basic data structures and algorithms 3. Synchronization Mechanism 4. Redo logs 5mini-transaction (mtr) 6.