Very often, myself or my friends were in need of a script to restore the backups from a predefined folder. It was hard to write the script in the hour of need. Hence, I thought I will share the script that has been created recently. Hope this script would be useful for you as well.

DECLARE @BACKUPFILENAME VARCHAR(MAX) = ''
DECLARE @MDFLOGICALNAME NVARCHAR(100)
DECLARE @LDFLOGICALNAME NVARCHAR(100)
DECLARE @DEST_PATH NVARCHAR(100)
DECLARE @SQL NVARCHAR(MAX)
DECLARE @DATABASENAME SYSNAME
CREATE TABLE #TRAILUPGRADEBACKUPFILES (ID INT IDENTITY(1,1),FILENAME SYSNAME,RESTORE_DRIVE CHAR(1))

/*********************************************************************************************************************************/
--The below code fetches the file list(backup file names) to be restored from the pre-defined folder
DECLARE @CommandShell TABLE ( Line VARCHAR(512)) 
DECLARE  @CMD VARCHAR(512) ,@BackupFilePath NVARCHAR(256)
SET @BackupFilePath = 'C:\TEMP_TOBEDELETED\' 
SET @CMD = 'DIR /B ' + @BackupFilePath +  ' /TC' 
				
INSERT INTO @CommandShell EXEC MASTER..xp_cmdshell   @CMD 
    
-- Delete lines not containing filename
DELETE 
FROM   @CommandShell 
WHERE  Line is null

If((Select Top 1 Line From @CommandShell) = 'Access is denied.') 
    PRINT 'Folder access is not provided for network path'
				
INSERT INTO #TRAILUPGRADEBACKUPFILES (FILENAME)
	Select * From @CommandShell A WHERE CHARINDEX('.BAK',LINE) > 0
/*********************************************************************************************************************************/

CREATE TABLE #TFILELISTONLY 
(
    TLOGINNAME SYSNAME,TPHYSICALNAME VARCHAR(MAX),
    TTYPE VARCHAR(1),TFILEGROUPNAME  VARCHAR(MAX),
    TSIZE BIGINT,TMAXSIZE BIGINT,TFIELD  VARCHAR(MAX),
    TCREATELSN VARCHAR(MAX),TDROPLSN VARCHAR(MAX),
    TUNIQUEID VARCHAR(MAX),READONLYLSN VARCHAR(MAX),
    READWRITELSN VARCHAR(MAX),BACKUPSIZEINBYTES VARCHAR(MAX),
    SOURCEBLOCKSIZE VARCHAR(MAX),FILEGROUPID VARCHAR(MAX),
    LOGGROUPGUID VARCHAR(MAX),DIFFERENTIALLSN VARCHAR(MAX),
    DIFFERENTIALBASEGUID VARCHAR(MAX),ISREADONLY VARCHAR(MAX),
    ISPRESENT VARCHAR(MAX),TDEHUMBPRINT VARCHAR(MAX),
)

WHILE EXISTS(SELECT 1 FROM #TRAILUPGRADEBACKUPFILES)
BEGIN
	
	SET @BACKUPFILENAME = (SELECT TOP 1 FILENAME FROM #TRAILUPGRADEBACKUPFILES ORDER BY FILENAME ASC)
	--Restore Path needs to be provided in the below
	SET @DEST_PATH = 'C:\DATA\'
		
	SET @DATABASENAME = (SUBSTRING(@BACKUPFILENAME,0,CHARINDEX('.',@BACKUPFILENAME)))
				
	--To check if the database is already present in the environment, If present, Drop the database
	IF Exists(SELECT 1 FROM master.sys.databases WHERE name = @DATABASENAME)
	BEGIN
	
		EXEC('DROP Database '+@DATABASENAME)
		Print @BACKUPFILENAME + ' has been successfully dropped.'
		
	END

	INSERT INTO #TFILELISTONLY
		EXEC ('RESTORE FILELISTONLY FROM DISK ='''+ @BackupFilePath +  @BACKUPFILENAME+'''')

	SET @MDFLOGICALNAME = (SELECT TLOGINNAME FROM #TFILELISTONLY WHERE TTYPE ='D')
	SELECT @LDFLOGICALNAME = (SELECT TLOGINNAME FROM #TFILELISTONLY WHERE TTYPE ='L')
        
	SELECT @SQL ='RESTORE DATABASE ' + @DATABASENAME + ' FROM DISK = ''' +  @BackupFilePath + @BACKUPFILENAME + ''' 
		WITH MOVE ''' + @MDFLOGICALNAME + ''' TO ''' + @DEST_PATH + @DATABASENAME + '.MDF'', 
		MOVE '''  + +  @LDFLOGICALNAME + ''' TO ''' + @DEST_PATH + @DATABASENAME + '.LDF'''
	
	EXEC (@SQL)
	
	Print @BACKUPFILENAME + ' has been successfully restored.'
		
	EXEC ('ALTER DATABASE [' + @DATABASENAME + '] SET RECOVERY SIMPLE;')

	DELETE FROM #TFILELISTONLY


	DELETE FROM #TRAILUPGRADEBACKUPFILES WHERE FILENAME =@BACKUPFILENAME	

END

DROP TABLE #TFILELISTONLY,#TRAILUPGRADEBACKUPFILES