What is the difference between a database and an instance?

What's the difference between database and instance?

Basically, a database is what's written in physical files on disk, while an instance is what runs in memory on a specific computer at a specific time. Your database instance exists only temporarily - it will disappear completely if you shut down your computer, stop the related service or detach the database.

What is the difference between SQL database and instance?

The main difference between instance and database in SQL server is that an instance is a copy of the sqlservr.exe executable that runs as an operating system service while a database is a systematic collection of data that stores data in tables. SQL Server is an RDBMS developed by Microsoft.

Is instance name and database name the same?

SID and instance name are the same thing and identify database instance = processes and memory. Database name identifies database = database files on disk. Service name identifies database instance for Oracle Net i.e. for remote access to database instance.

What is the difference between database schema and instance?

Schema is of three types: Logical Schema, Physical Schema and view Schema. ... Difference between Schema and Instance :SchemaInstanceDoes not change Frequently.Changes Frequently.Defines the basic structure of the database i.e how the data will be stored in the database.It is the set of Information stored at a particular time.