Restore log and differential backups on a Publication database.

Hi, i have the following issue, i have to restore a log backup and a differential backup in a publication database, the problem is that i want to keep the publications and the subscriptions without recreate the subscriptions.
So how can i perform this goal :/ is somebody know how can i do that please let me know :D !!! thanks in advance.
In my case is a merge replication....

For merge replication you do not need to worry about the log reader agent - in fact there should not be one. Ensure that you use the keep_replication switch when doing the restore.
Note that for merge replication the subscriber will backfill the publisher with changes in the publisher which are not in the subscriber. After this is done you might want to do a tablediff, but it should not be necessary, depending on how recent your full
and differential backups were done.
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Duplicate post
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/91c2ac7e-b122-426a-8a52-62ad452551c0/restoration-of-differential-backup?forum=sqldatabaseengine
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

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Hi... Balmukund
Restored the full backup on day 1 morning.
and restored differential backup on day 2 morning
From day 3 onwards restored the latest differential backup and
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for some reasons, I changed the database mode using the following script.
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select
name,
state_desc,is_in_standby
from sys.databases
HTH...

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* Full each sunday at 18:00
* Differnetial each evening at 22:00
* Transactional each hour
* rentention time 8 days
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[21-4-2015 20:00:00] [Info] Requested Backup Job: Differential
[21-4-2015 20:00:00] [Info] -------------------------------------------------------------------
[21-4-2015 20:00:00] [Info] Jobs Requested: Differential. Completed:None. To Run:Differential.
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[21-4-2015 20:00:00] [Info] Database Tfs_Configuration parent is 9859022596859328236
[21-4-2015 20:00:00] [Info] Starting Differential Backup server:RDSQL11\TFS database:Tfs_Configuration filename:\\RDSQL11\Backup$\Tfs_Configuration_9859024468858452975D.bak
[21-4-2015 20:00:00] [Info] BACKUP DATABASE [Tfs_Configuration] TO DISK = N'\\RDSQL11\Backup$\Tfs_Configuration_9859024468858452975D.bak' WITH DIFFERENTIAL, NOFORMAT, NOINIT, NOSKIP, REWIND, NOUNLOAD, STATS = 10
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[22-4-2015 20:00:00] [Info] Requested Backup Job: Differential
[22-4-2015 20:00:00] [Info] -------------------------------------------------------------------
[22-4-2015 20:00:00] [Info] Jobs Requested: Differential. Completed:None. To Run:Differential.
[22-4-2015 20:00:00] [Info] RunDifferentialBackupJob
[22-4-2015 20:00:00] [Info] Scanning configuration for new DBs
[22-4-2015 20:00:00] [Info] BackupSettings changed ? False
[22-4-2015 20:00:00] [Info] Starting differential backups
[22-4-2015 20:00:00] [Info] Database Tfs_Configuration parent is 9859022596859328236
[22-4-2015 20:00:00] [Info] Starting Differential Backup server:RDSQL11\TFS database:Tfs_Configuration filename:\\RDSQL11\Backup$\Tfs_Configuration_9859025332862172100D.bak
[22-4-2015 20:00:00] [Info] BACKUP DATABASE [Tfs_Configuration] TO DISK = N'\\RDSQL11\Backup$\Tfs_Configuration_9859025332862172100D.bak' WITH DIFFERENTIAL, NOFORMAT, NOINIT, NOSKIP, REWIND, NOUNLOAD, STATS = 10
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Exception Message: Cannot perform a differential backup for database "Tfs_Configuration", because a current database backup does not exist. Perform a full database backup by reissuing BACKUP DATABASE, omitting the WITH DIFFERENTIAL option.
BACKUP DATABASE is terminating abnormally. (type SqlException)
SQL Exception Class: 16
SQL Exception Number: 3035
SQL Exception Procedure:
SQL Exception Line Number: 1
SQL Exception Server: RDSQL11\TFS
SQL Exception State: 1
SQL Error(s):
SQL Error[1]: System.Data.SqlClient.SqlError: BACKUP DATABASE is terminating abnormally.
    Class: 16
    Number: 3013
    Server: RDSQL11\TFS
    Source: .Net SqlClient Data Provider
    State: 1
    Procedure:
    Line Number: 1
Exception Data Dictionary:
HelpLink.ProdName = Microsoft SQL Server
HelpLink.EvtSrc = MSSQLServer
HelpLink.EvtID = 3035
HelpLink.BaseHelpUrl = http://go.microsoft.com/fwlink
HelpLink.LinkId = 20476
So this is the same parent and the the file is still present on disk.
Can someone point in a direction to solve this issue?
Thanks!!

Hi RemkoP,
Based on your description, you can check whether you have a full backup file in your backup folder. Differential backups are backups of the changes that have occured since your last full database backup. If there no full backups, then we cannot perform a
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You might do a full backup for the database, then do the differential backup. If you have any other concerns, please elaobrate more details about your scenario and reproduce steps.
Best regards,

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Hello,
Please let me first apologize if this isn't the correct forum.
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P.S. Just in case, here's a screenshot of the differences:

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