What would be the best way to check that SQL Server .bak files are from the same backup? Say I backup a database like this:
BACKUP DATABASE AdventureWorksDW2017_2
TO DISK = 'C:\backup\advBackup2Peices\1.bak',
DISK = 'C:\backup\advBackup2Peices\2.bak',
DISK = 'C:\backup\advBackup2Peices\3.bak'
GO
Now if I run LABELONLY, HEADERONLY or FILELISTONLY on one of these backup files, I would get information about this backup - like this:
RESTORE FILELISTONLY
FROM DISK = 'C:\backup\advBackup2Peices\1.bak'
Without running the actual backup command, I would like to figure out this information below about these files (maybe using the above commands or any other commands)
How can I make sure that all these .bak files belong to the same backup?
Also, how to make sure the number of files this backup should contain (like above backup contains 3 files)?
The BackupSetGUID value of RESTORE HEADERONLY is the same for files of the same backup. The FamilyCount of RESTORE LABELONLY is the number of backup files.
Related
I am trying to come up with a script to dynamically do 'Restore Database' in SQL Server 2019 with multiple BAK files that are located in one folder on a daily basis.
I will do the manual full backup first, and this task will be scheduled to run after on a daily basis.
The plan is go thru each BAK files (located in the same folder) sequentially (for example here: 04 --> 12).
There will be another Python script which will wipe out old files, so I am only focusing on execution of Restore database with BAK files that are located in this folder.
What should be the best approach?
I have attached a screenshot that has all BAK files.
I have some T-SQL code here (that I copied from other thread), but I am not sure how to loop over each BAK file sequentially.
And I am not sure whether I have to deal with mdf and ldf files as listed here.
RESTORE DATABASE [Test] FROM DISK ='\\Folder\LOG...04.bak'
WITH
--what ever options... but likely a file move
MOVE 'data_file_1' TO 'E:\somefolder\data.mdf',
MOVE 'db_log' TO 'E:\somefolder\log.ldf',
REPLACE, --overwrites the database
RECOVERY --sets the DB to READ/WRITE. Use NORECOVERY if you need to restore
logs / differentials
GO
RESTORE LOG Test
FROM '\\Folder\Log...04.bak' --assuming this is a log
WITH FILE = 1, --this is the first log
WITH NORECOVERY; --keep in norecovery to restore other logs...
GO
i have multiple mdf files inside a single bak file how can I restore bak file in database.
you can run that command to see the file list of your bak file:
RESTORE FILELISTONLY FROM DISK ='<path>\<yourfile.bak>'
After you see the files you can build a restore command like that (just as sample):
restore database [db_name] from disk = '<file>.bak'
with
move '<data_file_name>' to 'D:\MSSQL\Data\<file>.mdf',
move '<log_file_name>' to 'D:\MSSQL\Data\<file>.ldf'
Run restore headeronly to list the backup sets in the file (device), then restore filelistonly to see the details of the backup set you want to restore, then restore database targeting the selected backup set.
--create the backup file
backup database adventureworks2017 to disk='c:\temp\aw.bak' with format, init
--append some more backups to the file
backup database adventureworks2017 to disk='c:\temp\aw.bak'
backup database adventureworks2017 to disk='c:\temp\aw.bak'
restore headeronly from disk='c:\temp\aw.bak'
restore filelistonly from disk='c:\temp\aw.bak' with file=2
restore database adventureworks2017 from disk='c:\temp\aw.bak' with file=2
I'm trying to restore a DB from the class. However, when I try to restore the .bak file, it seems like SSMS doesn't recognize it.
I gave full permissions to the folder which contains the .bak file (it is the default backup folder of ms SQL studio).
Steps I've taken to restore the .bak file:
Right click on DB -> Restore DB -> From device (selected the .bak file location) -> To Database (selected the DB destination)
Like here:
C:\Program Files (x86)\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\Backup
The DB is not corrupt I checked 2 other DB same result so I have no idea what is the problem
Here images:
I can not see the DB and I have almost the latest version of MS SQL studio so I can not understand what is going on here and why I can not restore DBs
I checked here:
restore database in ssms 2017 selected bak file in device option and showing nothing in Backup sets to restore option and disable Ok button too
and here:
SQL Server Management Studio can't recognize .bak file
https://www.youtube.com/watch?v=U0FpXwQfBaU
It should be easy and simple like the video above but like I said above something is wrong here and I do not know what is it.
Image of my SQL version
Once you (i mean the service account) got full permissions on the folder where the .bak file sitting and file not corrupted you should be able to restore without any issue, but there are times things fail in GUI and work perfectly with command line. not sure the issue might be exists one of the fix of SSMS release notes
However, you probably want to try following:
Verify the backup file - it does the verification of backup file and detects any error/corruption within backup file
RESTORE VERIFYONLY FROM DISK = 'C:\YourbackupLocation\DbName.bak';
Read the header - it returns information of backup file i.e. DB Version, appended backup files, LSN info and database recovery model etc..
RESTORE HEADERONLY FROM DISK = 'C:\YourbackupLocation\DbName.bak';
Get list of file names from backup - This will be helpful if the file location is different from the source server from where the backup was created
RESTORE FILELISTONLY FROM DISK = 'C:\YourbackupLocation\DbName.bak' ;
Restore backup - actual restore via T-SQL
RESTORE Backup DBName FROM DISK = 'C:\YourbackupLocation\DbName.bak' with replace, recovery, stats;
To relocate files
RESTORE Backup DBName FROM DISK = 'C:\YourbackupLocation\DbName.bak'
with replace, recovery, stats
--- Get the logical name from the result of "RESTORE FILELISTONLY" command
move 'DBName' to 'C:\NewLocation\DBName.mdf',
move 'DBName_Log' to 'C:\NewLocation\DBName_log.ldf' ;
SSMS 2012
Production server
Production database has Full recovery option.
I want to take a copy of this and restore on to same server with different name.
So I have taken a backup and choose restore but there is a message in the top left corner of the dialog which reads:
a tail-log backup of the source database will be taken...
Additionally, at this point I would rename the destination database, make sure that the rename has renamed the mdf and ldf files and that would be good to go. In this case it hasn't renamed the files so it looks like I will have to do that manually so as not to overwrite the prod database.
I haven't dealt with full recovery databases before. So questions:
What does the tail-log message mean and what are the implications?
Why did the destination database Rename not rename the mdf and ldf files - that's pretty dangerous huh?
What does the tail-log message mean and what are the implications?
Tailog backup message translates to "there is some transaction log generated after your last log backup,so please backup this log so that you can restore to any point in time until this backup"
Why did the destination database Rename not rename the mdf and ldf files - that's pretty dangerous huh?
backup copies only the files,it won't rename them and i don't see why this is dangerous..
I see you trying to restore to the same instance with different name,so tail log backup is not required,since you tried to overwrite the existing database might be the reason for showing tail log backup message
I use Sql Server 2005.
I wanna write code for restore a backup file, and I need to know what is database's name that backup file belongs to it.
How can I know?
I think the closest you can get is restore filelistonly ...
RESTORE FILELISTONLY From DISK = 'C:\temp\mybackup.bak' with file = 1
This returns data and the LogicalName field is the SQL Filename of File 1 in the database before it was backed up