The innodb engine is different from myisam in terms of statistics. Myisam has a built-in counter. Therefore, when using select count (*) from table, you can directly retrieve data from the counter. Innodb must scan the entire table once to obtain
MySQL foreign Key Usage Details, MySQL Key Usage Details
Recently, I started to create a laboratory management system. Because I have stored several tables, I want to maintain the association between tables. I studied the Foreign keys of MySQL.
(1)
MyfavoritequestionduringInterviewforpeopletoworkasMySQLDBAsorbeinvolvedwithMySQLPerformanceinsomewayistoaskthemwhatshouldbetune dinMySQLServerstraightafterinstallation, assumingitwasinstalledwithdefaul
My favorite question during Interview for
Mysql optimization Summary (1)
I. SQL _mode mode of mysql:
(1) This mode means that the SQL mode can control server operations, and the SQL mode exists at the global and session level. If you want to know the current value of global or session-level
MySQL backup lock and mysql backup
Both logical and physical backups depend heavily on FTWRL (Flush Table With Read Lock) to obtain consistency points ). This lock is highly lethal, because during the lock period, the entire database cannot provide
To learn about the Mysql database and what Mysql table types are required, we will introduce you to the seven Mysql table types below, hoping to help you learn about the Mysql table types.
MySQL, as the most popular free database service engine, has
Seven Mysql table types: bitsCN.com
Seven Mysql table types
To learn about the Mysql database and what Mysql table types are required, we will introduce you to the seven Mysql table types below, hoping to help you learn about the Mysql table types.
MySQL discrete notes-foreign key Mysql foreign key
References: about MySQL foreign keys and mysql foreign key association creation
MySQL has the same definition of "key" and "index", so foreign keys and primary keys are also an index. The
1) for tables of the Myisam type, you can import a large amount of data quickly using the following methods. Alter table tblname disable keys;Loading the dataAlter table tblname enable keys;These two commands enable or disable the update of
References: About MySQL Foreign keys and MySQL foreign key Association Creation
MySQL has the same definition of "key" and "Index", so foreign keys and primary keys are also an index. The difference is thatMySQL automatically indexes the primary
How to Use mysqldump to back up MySQL Data,
MySQL's mysqldump tool supports single-threaded operations. Multiple tables are exported one by one without a parallel machine, which makes it unable to quickly back up data.
Mydumper is a utility that
MySQL engine introduction ISAM, MyISAM, HEAP, InnoDB
The MySQL Database Engine depends on how MySQL is compiled during installation. To add a new engine, you must recompile MySQL.
By default, MySQL supports three engines: ISAM, MYISAM, and HEAP. The
CACTI: Use a template to monitor mysql on a local server or another server
Mysql templates, online are using this address http://mysql-cacti-templates.googlecode.com has not been accessed
File currently downloaded:
CACTI: Use templates to monitor mysql and cactimysql on local or other servers
Mysql templates, online are using this address http://mysql-cacti-templates.googlecode.com has not been accessed
Google found this URL:
Introduction: http://www.percona.
As InnoDB is a robust transactional storage engine that has been used for more than 10 years, some heavyweight Internet companies (Yahoo, Google Netease, Taobao) are also frequently used.
I often use InnoDB in my daily work. Now I will list some
More than 30 mysql database optimization methods, with 10 million-level database records easily solved, mysql database
1. To optimize the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where
Database Engine Introduction
The MySQL Database Engine depends on how MySQL is compiled during installation. To add a new engine, you must recompile MYSQL. By default, MYSQL supports three engines: ISAM, MYISAM, and HEAP. The other two types of
A relational database management system like MySQL is based on the ability to create relationships between database tables. By easily establishing a record-to-record relationship in different tables, RDBMS can analyze data using different methods,
This article introduced the MySQL backup principle, welcome everybody to read.
Backup is the last line of defense for data security, and for any data loss scenario, backups may not necessarily restore the absolute data (depending on the backup
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