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Using Filegroups and Files to Store Data

Using Filegroups and Files to Store Data

Data files are used to store database files. The data files are subdivided into file groups. The Database object has a FileGroups property that references a FileGroupCollection object. Each FileGroup object in that collection has a Files property. This property refers to a DataFileCollection collection that contains all the data files that belong to the database. A file group is principally used to group files together that are used to store a database object. One reason for spreading a database object over several files is that it can improve performance, especially if the files are stored on different disk drives.

Every database that is created automatically has a file group named "Primary" and a data file with the same name as the database. Additional files and groups can be added to the collections.

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