I have transaction log file that goes back 6 months. I need to roll back everything that happened after 5/20/2013 from a database. Can anyone please enlighten me on how to do this?
First of all, copy the database MDF and LDF files. Better safe than sorry
The database can be restored to a point in time in SQL Server 2008R2, also. There's no need to create a transaction log backup first, it'll be done automatically by SQL Server. You can find more about the log-tail backup here: Tail-Log Backups
Select to restore the database in the database context menu
Leave Database as Source. Click Timeline
- Select Specific date and time. If you drag the time pointer, you'll able to see how long back your transaction log goes. Note that bright green shows that the transactions have never been backed up
After all is done, schedule transaction log backups. There's no point to have a database in Full recovery model and never backup the online transaction log
来源：https://stackoverflow.com/questions/16945254/how-to-perform-sql-roll-back-from-transaction-logs