DECLARE @DT AS VARCHAR(255)
SET @DT = N'D:\data\DbBackup\lngmanage\lngmanage_' + CONVERT(VARCHAR(255),GETDATE(),12)+ '.bak';

BACKUP DATABASE [LNGManage] TO DISK = @DT WITH NOFORMAT,NOINIT,NAME = 
N'LNGManage- ݿ ',SKIP,NOREWIND,NOUNLOAD,STATS = 10
GO