What is file and filegroup in 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.

What is filegroup SQL Server?

The filegroup contains the primary data file and any secondary files that aren't put into other filegroups. User-defined filegroups can be created to group data files together for administrative, data allocation, and placement purposes.

What is file and filegroup backup in SQL Server?

When the database size and performance requirements make a full database backup impractical, you can create a file backup instead. 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 are SQL files?

What is an SQL file? A file with . sql extension is a Structured Query Language (SQL) file that contains code to work with relational databases. It is used to write SQL statements for CRUD (Create, Read, Update, and Delete) operations on databases.