What is restore files and filegroups in SQL Server?

What is Files and Filegroups in SQL Server?

File and Filegroup Fill Strategy As data is written to the filegroup, the SQL Server Database Engine writes an amount proportional to the free space in the file to each file within the filegroup, instead of writing all the data to the first file until full. It then writes to the next file.

What is file and filegroup backup?

A file backup contains all the data in one or more files (or filegroups). For more information about file backups, see Full File Backups (SQL Server) and Differential Backups (SQL Server).

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.

How many types of filegroups are there in SQL Server?

There are two types of SQL Server filegroups: primary and user-defined. Primary filegroup includes all pages for system tables, primary data file and all other files that are not part of any other filegroup.