type of table

The introduction of four kinds of engines commonly used by MySQL(1): MyISAM Storage Engine: Does not support transactions, also does not support foreign keys, the advantage is fast access, no requirements for transaction integrity or

We know that the Oarcle database really holds the data file (data files), the oarcle tablespace (tablespaces) is actually a logical concept, and he does not physically exist, so a set of data files will be a table space to twist together.Table Space

is the type of table, for different storage engines, MySQL will have different processing logicIn real life, the files we use to store data should have different types: for example, TXT type for storing text, Excel for Save form, PNG for image,

DAY02 MySQL Database basicsI. Overview of basic knowledge:The foundation determines the success or failure of your course! Only after learning these basic knowledge, you can really be in the right. To be able to have a deeper understanding of the

Characteristics Mysql PostgreSQL Instance Launch the instance by executing the MySQL command (MYSQLD). One instance can manage one or more databases. A single server can run multiple mysqld instances. An instance manager

MyISAM and InnoDB explanationInnoDB and MyISAM are the two most common table types used by many people when using MySQL, both of which have pros and cons, depending on the application. The basic difference is that the MyISAM type does not support

MySQL supports table-level locking of tables in the MyISAM and memory storage engines, and row-set locking of tables in the InnoDB storage engine. It is automatically obtained by default.The lock TABLES can be used to lock the table obtained by the

Oracle Tablespace (tablespaces)We know that the Oarcle database actually holds the data file (data files), and theoarcle tablespace (tablespaces) is actually a logical concept, He does not exist physically, so a set of data files can be a table

recently began to learn hibernate, looking at Li Gang's "Lightweight Java EE Enterprise application combat." For the first Hibernate program, I wrote down the example of the book and just changed some of the MySQL connection parameters and created a

Syntax structure:[no_write_to_binlog | LOCAL] TABLE[, Tbl_name] ...Optimize table reorganizes the physical storage of tables data and indexes, reducing the IO efficiency when using storage space and improving access to tables. Optimize table

Log in to the database system:Mysql–h Localhost–u root–pwhere the "-H" parameter refers to the host name of the connection, so here is the connection to the machine, so the following content is localhost;The "-u" parameter indicates the user name,

MySQL storage engine--myisam and InnoDB difference-good water, water good for all things without contention. -CSDN Blog http://blog.csdn.net/xifeijian/article/details/20316775MyISAM and InnoDB explanationInnoDB and MyISAM are the two most common

I. Data type-related issues 1, varchar (N) How much space is occupied(1) The N in varchar (n) is the number of characters, not the number of bytes;(2) Character type (varchar text blob, etc.) space = character actual length + field length;(3) The

MySQL has two kinds of storage engines: InnoDB and MyISAMThere are six major differences between the two: MyISAM InnoDB The difference in composition: Each myisam is stored as three files on disk. The

MySQL is very powerful, support direct copy database file Quick Backup, where is the database file?Open the MySQL configuration file My.iniand locate the datadir node, asDatadir= "D:/program files/mysql/mysql Server 5.1/data"Enter the above folder,

1/isamISAM is a well-defined and time-tested form of data management that, at design time, takes into account that the number of times the database is queried is much larger than the number of updates. As a result, ISAM performs read operations

From:http://www.jb51.net/article/37766.htmMySQL has a variety of storage engines, MyISAM and InnoDB are two of the most common. Here are some basic concepts about these two engines (not in-depth introduction).MyISAM is the default storage engine for

Storage EngineDatabase Storage Engine (How the data is stored and how the transaction is affected ) types of storage and manipulation tablesThere is only one storage engine in Oracle and SQL , andMySQL has a variety of storage engines, Users can

Let's start by saying something:MySQL's InnoDB and MyISAM are the two most common table types used in MySQL, each with its pros and cons. The main difference between the two types is InnoDB Transactional and foreign key and row level locks are

Add by Zhj: In the MySQL5.6 of some parameters have been increased, see http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.htmlOriginal: http://mageedu.blog.51cto.com/4265610/1062628Marco Education Linux operation and maintenance