Not able to repair corrupted database.

Question

Hi Experts:
One of my database got corrupted and I an trying to repair by using following steps:
ALTER DATABASE [abcde]
SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
GO
When I excute the above, the database is in single user mode, 
DBCC CHECKDB ([abcde],
REPAIR_ALLOW_DATA_LOSS)
WITH NO_INFOMSGS;
GO,
but when I execute this statement, I am getting an error as 
Msg 924, Level 14, State 1, Line 1
Database 'abcde' is already open and can only have one user at a time, when I googled, it says to find out active sessions ans kill them to bring to multi user which I did, but how to proceed with repairing the database
ALTER DATABASE [abcde]SET
MULTI_USER WITH ROLLBACK IMMEDIATE;
GO
ALTER DATABASE [abcde]
SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
GO
DBCC Checkdb([abcde],
REPAIR_rebuild)
go
ALTER DATABASE [abcde]
SET MULTI_USER WITH ROLLBACK IMMEDIATE;
GO
Please advice me .
Thanks in advance.

Answer 1

Do you have a known good backup? If so the best option is to restore from the backup which would guarantee the data consistency.
Before trying out DBCC CHECKDB ([abcde],
REPAIR_ALLOW_DATA_LOSS)
did you try just DBCC CHECKDB(abcde) and did it suggest repair_allow_data_loss? What did it suggest? You are not supposed to directly run repair_allow_data_loss as it causes data loss which cannot be quantified.
What happened when you run the below? They should also do the repair!!
ALTER DATABASE [abcde]
SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
GO
DBCC Checkdb([abcde],
REPAIR_rebuild)
go
Regards, Ashwin Menon My Blog - http:\\sqllearnings.com