1. deleted data without backups?
How to recover...
deleted data
without backups?
Vedran Kesegić

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3. Platinum sponsor

4. About me M.Sc., FER, Zagreb, Croatia
SQL Server Consultancy (performance)
Microsoft Certified Master, MCT
Author: XDetails (SQL Management Studio)
Hobby: Photography

5. Tough situation? Data is deleted or updated by mistake
DB is in SIMPLE recovery model
There are no backups!
It is impossible to recover!
... almost 

6. 3 Methods:
Good method
Bad method
Ugly method
Not for faint-hearted! 

7. A bit of theory...
<60 sec

8. React FAST! Clone the files (Why FULL backup is NOT enough?) Relax
Put db OFFLINE
Copy files (both data and log)
Put db ONLINE
Relax
you bought time to recover the data
Needed by all 3 recovery methods!

9. Cloning the database (What is different from FULL backup?)
DEMO
Cloning the database
(What is different from FULL backup?)

10. Recovery methods ALL METHODS REQUIRE CLONING FIRST !!!
Process Kill (sqlservr.exe)
Works if executed fast (before CHECKPOINT)
NOT recommended (violent, too short time)
Read „empty” part of transaction log
Undocumented commands and trace flags
Good, but not easy (will show in DEMO)
3rd party tools (ApexSQL log)
Easy
Costs money (well worth)
ALL METHODS REQUIRE CLONING FIRST !!!

11. DEMO Extreme Recovery: Process Kill
(Why it works? When it will not work?)
DON’t DO IT!

12. DEMO Recovery by reading „empty” space of transaction log
(reverse UPDATE and DELETE)

13. Recovery with 3rd party tool (ApexSQL Log)
DEMO
Recovery with 3rd party tool
(ApexSQL Log)

14. Online options? Copy data and log files ONLINE? SAN snapshots
VM snapshots (if running SQL in VM)
VSS (Volume Shadow Service)
Tools that use VSS (e.g. FreeFileSync)

15. Summary
CLONE files ASAP!
Relax 
Use your favourite method!

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