Mutiple Backup Is Good Choice?

Hi,

I am using a stored procedure to take backup of my database from the Visual Basic Programming.

Before i posted one of my thread with the same thing, so i was recommended to go through with DMOSQL do deal with SQL server with Visual Basic Programming. For me, this takes some time to understand the complete concept.

Because of urgent i am using stored procedure to take backup with the following:

---------------------------------------------------------------------------------------
ALTER PROCEDURE dbo.BackUPBLMSDB

(
@RP nvarchar(200)
)

AS

declare @backupfilename nvarchar(200)
set @backupfilename=@RP
BACKUP DATABASE [BLMSDB] TO DISK = @backupfilename WITH NOFORMAT, NOINIT, NAME = N'BLMSDB-Full Database Backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10
---------------------------------------------------------------------------------------
Example @RP="D:ackupBackup-1 09-02-2008 11-24"


Every time i am passing a parameter with somename and dateandtime(System).
Example

Backup-1 09-02-2008 11-24 2900KB
Backup-1 09-02-2008 12-30 2900KB
Backup-1 09-02-2008 18-10 5400KB
Backup-1 09-02-2008 22-00 2900KB
Backup-1 09-02-2008 22-00 2900KB

I would like to clear my doubt, is it a good practice to take backup with different names. The above one i store four backups . If the system crashes and i created the new database with the same schema without any data present in the tables, can i restore previous backup database to the newly created database.

Moreover, The first two backups contains "2900KB", the third one is "5400KB" after the data is being modified. Look at the fourth one it is "2900KB". Why the size is being reduced to "2900KB" after taking backup eventhough i didn't delete or added data into the database.



Hope you will solve my problem.

Thanks.



Best Regards,
Kashif Chotu