What is a filegroup and what is it used for?

What is the purpose of creating a filegroup?

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 the purpose of secondary data file?

Secondary data files are optional and can be used to spread data across multiple files/disks by putting each file on a different disk drive. SQL Server databases can have multiple data and log files, but only one primary data file.

What is a filegroup name the two main types of filegroups?

Primary and Secondary Filegroups. A primary filegroup contains the primary datafile (mdf) and possibly secondary datafiles (ndf). All system tables are allocated to the primary filegroup. A secondary filegroup (also called a user-defined filegroup) contains secondary datafiles (ndf) and database objects.

How do I drop a filegroup?

Select the Files page. In the Database files grid, select the files to delete, click Remove, and then click OK. Select the Filegroups page. In the Rows grid, select the filegroup to delete, click Remove, and then click OK.