Restore Database backup consisting of multiple files via script - sql-server

Question

I frequently need to restore database from backup files on my SQL server and I have a configurable script that takes care of that. Basically the script is using RESTORE command and has variables all over to replace database name, bak file folder, etc. However, one issue I face is restoring a database which is split into multiple files, at times the count goes up till 100.
So my question is how do I make the script dynamic so that I can just specify a file count and the script will iterate through all files and restore it. From what I understand the RESTORE command does not allow this flexibility.
One option that I see right now is to dynamically generate the entire RESTORE command and then execute it, but I want to use it only as a last option.
Are there any other options?
Thanks,

Answer 1

I am not sure that I understand you about "specify a file count", but I use some kind of script for implement testing environment for myself. I hope it helps you. Feel free to ask me
declare #fileListTable table
(
LogicalName nvarchar(128),
PhysicalName nvarchar(260),
[Type] char(1),
FileGroupName nvarchar(128),
Size numeric(20,0),
MaxSize numeric(20,0),
FileID bigint,
CreateLSN numeric(25,0),
DropLSN numeric(25,0),
UniqueID uniqueidentifier,
ReadOnlyLSN numeric(25,0),
ReadWriteLSN numeric(25,0),
BackupSizeInBytes bigint,
SourceBlockSize int,
FileGroupID int,
LogGroupGUID uniqueidentifier,
DifferentialBaseLSN numeric(25,0),
DifferentialBaseGUID uniqueidentifier,
IsReadOnl bit,
IsPresent bit,
TDEThumbprint varbinary(32)
)
insert into #fileListTable exec('restore filelistonly from disk = ''C:\Share\BackUp\Reporting\Prod23.bak''') -- hear I get all files from backup
select * from #fileListTable
declare #sctript nvarchar(max)
select
#sctript = 'restore database Prod from disk = ''C:\Share\BackUp\Reporting\Prod23.bak'' WITH FILE = 1,' +
STUFF( (SELECT results.MoveTo + ' , '
from
(
select
'MOVE ''' + LogicalName+ ''' TO ''E:\MobiledbnkDB_Report\' + LogicalName +
case [Type]
when 'D' then '.mdf'
when 'L' then '.ldf'
end + ''' ' as MoveTo
FROM #fileListTable -- hear I mode files to another folder
) as results
FOR XML PATH('')),
1, 0, '')
+ ' NOUNLOAD, STATS = 5'
use master
if exists(SELECT * FROM sys.databases d WITH(NOLOCK) where d.name = 'Prod')
begin
alter database Prod set restricted_user with rollback immediate
drop database Prod
end
print #sctript
exec (#sctript)

Answer 2

I think what you are looking for is a solution I came up with to restore uncompressed LiteSpeed files. Since the amount of files differs based on how many threads litespeed had available at the time of the backup, we never know how many files we will need to include to restore to our reporting environment. I used Vladimir's use of the stuff function and another script to do the following. Replace FILELOCATION with your folder and update your database, data and log file names.
Declare #BackupFolder nvarchar(100) = N'FILELOCATION'
DECLARE #BackupDirectory SYSNAME = #BackupFolder
IF OBJECT_ID('tempdb..#DirTree') IS NOT NULL
DROP TABLE #DirTree
CREATE TABLE #DirTree (
Id int identity(1,1),
SubDirectory nvarchar(255),
Depth smallint,
FileFlag bit,
ParentDirectoryID int
)
INSERT INTO #DirTree (SubDirectory, Depth, FileFlag)
EXEC master..xp_dirtree #BackupDirectory, 10, 1
UPDATE #DirTree
SET ParentDirectoryID = (
SELECT MAX(Id) FROM #DirTree d2
WHERE Depth = d.Depth - 1 AND d2.Id < d.Id
)
FROM #DirTree d
DECLARE
#ID INT,
#BackupFile VARCHAR(MAX),
#Depth TINYINT,
#FileFlag BIT,
#ParentDirectoryID INT,
#wkSubParentDirectoryID INT,
#wkSubDirectory VARCHAR(MAX)
DECLARE #BackupFiles TABLE
(
FileNamePath VARCHAR(MAX),
TransLogFlag BIT,
BackupFile VARCHAR(MAX),
DatabaseName VARCHAR(MAX)
)
DECLARE FileCursor CURSOR LOCAL FORWARD_ONLY FOR
SELECT * FROM #DirTree WHERE FileFlag = 1
OPEN FileCursor
FETCH NEXT FROM FileCursor INTO
#ID,
#BackupFile,
#Depth,
#FileFlag,
#ParentDirectoryID
SET #wkSubParentDirectoryID = #ParentDirectoryID
WHILE ##FETCH_STATUS = 0
BEGIN
--loop to generate path in reverse, starting with backup file then prefixing subfolders in a loop
WHILE #wkSubParentDirectoryID IS NOT NULL
BEGIN
SELECT #wkSubDirectory = SubDirectory, #wkSubParentDirectoryID = ParentDirectoryID
FROM #DirTree
WHERE ID = #wkSubParentDirectoryID
SELECT #BackupFile = #wkSubDirectory + '\' + #BackupFile
END
SELECT #BackupFile = #BackupDirectory + #BackupFile
INSERT INTO #BackupFiles (FileNamePath) VALUES(#BackupFile)
FETCH NEXT FROM FileCursor INTO
#ID,
#BackupFile,
#Depth,
#FileFlag,
#ParentDirectoryID
SET #wkSubParentDirectoryID = #ParentDirectoryID
END
CLOSE FileCursor
DEALLOCATE FileCursor
SELECT #BackupFolder + '\' + SubDirectory from #DirTree
Declare #filecount int = (select count(*) from #DirTree)
declare #sctript nvarchar(max)
select
#sctript = 'RESTORE DATABASE rrrealty FROM ' +
STUFF( (SELECT +',' + results.MoveTo
from
(
select 'DISK = N''' + 'FILELOCATION' + SubDirectory + '''' as MoveTo
FROM #DirTree -- hear I mode files to another folder
) as results
FOR XML PATH('')),
1, 1, '') + ' WITH FILE = 1
MOVE N''file'' TO N''file.mdf'',
MOVE N''file_Log'' TO N''L:\filelog.ldf'',
NOUNLOAD, REPLACE, STATS = 5'
Exec (#sctript)