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This article will explain in detail what the database instance means, Xiaobian thinks it is quite practical, so share it with you for reference, I hope you can gain something after reading this article.

Database instance is a program, a layer of data management software located between the user and the operating system, and a channel for accessing the database; any operation performed by the user on the data in the database, including data definition, data query, data maintenance, database operation control, etc., is performed under the database instance, and the application program can only deal with the database through the database instance.

Operating environment of this tutorial: Windows 7 system, MySQL8 version, Dell G3 computer.

1. Database

A collection of physical operating system files or disk data blocks

Data files, index files, structure files.

Not all database systems are file-based, and there are forms of writing data directly to the data store.

2. Database Instance

An instance refers to a series of processes in an operating system and the memory blocks allocated to those processes.

A database instance is a program, a layer of data management software that sits between the user and the operating system.

A database instance is a channel for accessing a database. Any operations performed by users on the data in the database, including data definition, data query, data maintenance, database operation control, etc., are performed under the database instance. Applications can only deal with the database through the database instance.

Usually, one database instance corresponds to one database.

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