How can I use T-SQL to find a file name in a windows directory?

In an SQL stored procedure, I need to query a folder in the windows file system and determine whether a specific file name exists in that folder.  Can I do that using T-SQL?
T HoecherlDeveloperAsked:
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quizwedgeCommented:
You'll need to use xp_cmdshell which is disabled by default. I'm assuming there are security risks with that, so make sure you understand them before implementing it.

Check out http://sqljourney.wordpress.com/2010/06/08/get-list-of-files-from-a-windows-directory-to-sql-server/ for how to enable xp_cmdshell and use the windows file system.

You'll enable it by using

--allow advanced options to be changed.
EXEC sp_configure 'show advanced options', 1
GO
--Update the currently configured value for advanced options.
RECONFIGURE
GO
--Enable XP_CMDSHELL
EXEC sp_configure 'xp_cmdshell', 1
GO
--Update the currently configured value for this feature.
RECONFIGURE
GO

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Below is code that will get the list of files in the directory.
--Create the table to store file list
CREATE TABLE myFileList (FileNumber INT IDENTITY,FileName VARCHAR(256))
--Insert file list from directory to SQL Server
DECLARE @Path varchar(256) = 'dir C:\Import\'
DECLARE @Command varchar(1024) =  @Path + ' /A-D  /B'
INSERT INTO myFileList
EXEC MASTER.dbo.xp_cmdshell @Command
--Check the list
SELECT * FROM myFileList
GO
--Clean up
DROP TABLE myFileList
GO

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That code is from the above URL. You could change the select * from myFileList query to be the file name.
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