What is filegroup 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.

How do I find the filegroup in SQL Server?

How to check SQL Server Filegroup file sizes1SELECT sdf. name AS [File_Name],2sdf. size /128 AS [Size_MB],3fg. name AS [FileGroup_Name],4sdf.physical_name as [File_physical_name]5FROM sys.database_files sdf.6INNER JOIN.7sys.filegroups fg.8ON sdf.data_space_id=fg.data_space_id.How to check SQL Server Filegroup file sizes

What is the name of SQL Server default filegroup?

PRIMARY filegroup - this is the default filegroup that is created when you create a new database. Default filegroup - when creating new tables and indexes this specifies which filegroup is the default if a filegroup is not specified.

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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