What are files and filegroups in SQL Server?

Question

Filegroups are the physical files on your disc volumes that hold SQL Server's data and can be used for backup and administrative management purposes. The first thing to know are what types of files SQL Server uses: Primary Data Files. Secondary Data Files. Log Files. 17 янв. 2017 г.

What is difference between file and filegroup in SQL Server?

tl;dr; Filegroups are a logical construct used to separate tables and indexes from each other, files are the physical construct used to store information (log & data) about the database.

What are files in database?

Database Files are data files that are used to store the contents of the database in a structured format into a file in separate tables and fields. Database files are commonly used by dynamic websites (eg. Facebook, Twitter, etc.) to store data.

What is file type in SQL Server?

A SQL Server database has three types of files: Primary Data File OR MDF File. Secondary data file OR NDF File. Log File OR LOG File.

What are mdf and NDF files in SQL Server?

NDF is secondary storage file because SQL server stores user specified data in primary storage file known as MDF. NDF data file is optional and is user-defined to manage data storage in case the primary MDF file uses all the allocated space.

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