FILE_ID (Transact-SQL)

Returns the file identification (ID) number for the given logical file name in the current database.

Important noteImportant

This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Use FILE_IDEX instead.

Topic link iconTransact-SQL Syntax Conventions

FILE_ID (file_name)


Is an expression of type sysname that represents the name of the file for which to return the file ID.


file_name corresponds to the logical file name displayed in the name column in the sys.master_files or sys.database_files catalog views.

In SQL Server, the file identification number assigned to full-text catalogs is greater than 32767. Because the return type of the FILE_ID function is smallint, this function cannot be used for full-text files. Use FILE_IDEX instead.

The following example returns the file ID for the AdventureWorks_Data file.

USE AdventureWorks;
SELECT FILE_ID('AdventureWorks_Data')AS 'File ID';

Here is the result set.

File ID 
(1 row(s) affected)