What is the use of engine InnoDB in MySQL?

InnoDB is a general-purpose storage engine that balances high reliability and high performance. In MySQL 5.6, InnoDB is the default MySQL storage engine. Unless you have configured a different default storage engine, issuing a CREATE TABLE statement without an ENGINE clause creates an InnoDB table.

What is engine InnoDB Auto_increment?

1.6 AUTO_INCREMENT Handling in InnoDB. InnoDB provides a configurable locking mechanism that can significantly improve scalability and performance of SQL statements that add rows to tables with AUTO_INCREMENT columns.

What does engine mean in MySQL?

Storage engines (underlying software component) are MySQL components, that can handle the SQL operations for different table types to store and manage information in a database.

What is the default engine of MySQL?

InnoDB
The default engine is InnoDB in MySQL 5.7. You can specify the default engine by using the –default-storage-engine server startup option, or by setting the default-storage-engine option in the my. cnf configuration file.

Is default and widely used MySQL storage engine?

InnoDB is the most widely used and ACID-based storage engine set as default in MySQL versions 8.0 or higher.

What is the difference between MySQL and InnoDB?

Here are a few of the major differences between InnoDB and MyISAM: InnoDB has row-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.

What is Last_insert_id in MySQL?

The LAST_INSERT_ID() function returns the AUTO_INCREMENT id of the last row that has been inserted or updated in a table.

What is unique MySQL?

The UNIQUE constraint ensures that all values in a column are different. Both the UNIQUE and PRIMARY KEY constraints provide a guarantee for uniqueness for a column or set of columns.

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.