For the given logical name for a component file of the current database, this function returns the file identification (ID) number.
This feature is in maintenance mode and may 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.
FILE_ID ( file_name )
An expression of type sysname, representing the logical name of the file whose file ID value
FILE_ID will return.
file_name corresponds to the logical file name displayed in the name column of the sys.master_files or sys.database_files catalog views.
NULL if file_name does not correspond to the logical name of a component file of the current database.
In SQL Server, the file identification number assigned to full-text catalogs exceeds 32767. Because the
FILE_ID function has a smallint return type,
FILE_ID will not support full-text files. Use FILE_IDEX instead.
This example returns the file ID value for the
AdventureWorks_Data file, a component file of the
USE AdventureWorks2012; GO SELECT FILE_ID('AdventureWorks2012_Data')AS 'File ID'; GO
Here is the result set.
File ID ------- 1 (1 row(s) affected)