How do I find MySQL engine?
To determine which engine a database table is currently using, type the following command at the mysql> prompt. Replace database with the name of the database that you want to check: SELECT TABLE_NAME, ENGINE FROM information_schema.
How many engines does MySQL have?
There are two types of storage engines in MySQL: transactional and non-transactional. For MySQL 5.5 and later, the default storage engine is InnoDB.
How can I see the storage engine of a table in MySQL?
To show a list of all the tables in a database and their engines, use this SQL query: SELECT TABLE_NAME, ENGINE FROM information_schema. TABLES WHERE TABLE_SCHEMA = ‘dbname‘; Replace dbname with your database name.
What are the most common storage engines for MySQL?
Common storage engines used in MySQL are InnoDB and MyISAM. The default storage engine in MySQL prior to version 5.5 was MyISAM. In the case of MySQL 5.5 and later, the default storage engine is InnoDB. There are many other storage engines also which are used in MySQL.
How can I tell which database MySQL is using?
mysql> use test Database changed mysql> SELECT DATABASE() FROM DUAL; The following is the output. mysql> show databases; Here is the output that displays all the databases.
Which MySQL engine is best?
Most Popular MySQL Storage Engines
- MyISAM. MyISAM was the MySQL default storage engine prior to version 5.5. …
- InnoDB. If you work on applications based on MySQL now, InnoDB will most likely be your storage engine. …
- Federated. Although not default, Federated is a well-known storage engine for MySQL.
Which MySQL engine is faster?
3 Answers. Using an InnoDB table comes with an overhead of transactional support, rollbacks etc. If you don’t need this support for transactions then you should really go with an MyISam table as it doesn’t have any transactional support and can be faster for lookups etc.
What is difference between InnoDB and MyISAM?
InnoDB vs MyISAM
InnoDB has row-level locking. MyISAM only has full table-level locking. InnoDB has what is called referential integrity which involves supporting foreign keys (RDBMS) and relationship constraints, MyISAM does not (DMBS). InnoDB supports transactions, which means you can commit and roll back.
How do I change the storage engine in MySQL?
Login to phpMyAdmin. Navigate to database table whose storage engine you wish to change. Click on Operations tab, under Table options you would find drop down called Storage Engine. Select storage engine of your choice from the Storage Engine drop down and click on Go button.
How does InnoDB check engine status?
SHOW ENGINE INNODB STATUS is a specific form of the SHOW ENGINE statement that displays the InnoDB Monitor output, which is extensive InnoDB information which can be useful in diagnosing problems.
How do I convert MyISAM to InnoDB?
Convert MyISAM to InnoDB
- Log in to your phpmyadmin. The address is usually, http(s)://www.example.com/phpmyadmin.
- change one of the db rows. In this example I will change “orderrader” to InnoDB.
- Simply go to “Operations”
- Change this value to InnoDB.
- And you’re done. Simple as that!
What is the difference between MyISAM static and MyISAM dynamic?
In MyISAM static all the fields have fixed width. The Dynamic MyISAM table would include fields such as TEXT, BLOB, etc. to accommodate the data types with various lengths.
What Cannot have a trigger associated with it?
Since triggers execute as part of a transaction, the following statements are not allowed in a trigger: All create commands, including create database, create table, create index, create procedure, create default, create rule, create trigger, and create view. All drop commands. alter table and alter database.
What command can be used to check the storage engines which are enabled and available?
7.16 SHOW ENGINES Statement. SHOW ENGINES displays status information about the server’s storage engines. This is particularly useful for checking whether a storage engine is supported, or to see what the default engine is.