如何在SQL Server 2008中使用带触发器的备份？

Question

I have a table (Cycle) and I created a trigger

alter trigger AnyName on Cycles
for insert,update,delete
AS
BACKUP DATABASE medrepcrm TO  DISK = N'C:\medrepcrm.bak' WITH NOFORMAT, INIT,  NAME = N'pcrm-Full Database Backup', SKIP, NOREWIND, NOUNLOAD,  STATS = 10
GO

But when I insert, update, or delete in the Cycle table that leads to an error.

Msg 3021, Level 16, State 0, Procedure AnyName, Line 8
Cannot perform a backup or restore operation within a transaction.
Msg 3013, Level 16, State 1, Procedure AnyName, Line 8
BACKUP DATABASE is terminating abnormally.
The statement has been terminated.

What can I do to fix this error?

Answer 1

BACKUP DATABASE on MSDN says

The BACKUP statement is not allowed in an explicit or implicit transaction.

A trigger is always in a transactions

If you work it through, a backup which is transactionally consistent snapshot of a database: it doesn't make sense for it to be in it's own transaction.

Not least, on RESTORE the roll forward/roll back mechanism would have to rollback the transaction containing the backup... which defeats the purpose of the backup in the first place...

Answer 2

You could start a job sp_start_job . Within the job you execute a stored procedure where you execute the backup statement. I've done this already with a server trigger which is fired when a new database is created.