SQLServer代码差异备份

--完整备份
Declare @FileName varchar(100)
Set @FileName='D:\' + convert(varchar(10),getdate(),120)+ '.bak'
BackUp Database CoalTraffic To Disk=@FileName 
With Init

 --差异备份（必须与完整备份同名）

Declare @FileName varchar(100)
Set @FileName='D:\' + convert(varchar(10),getdate(),120)+ '.bak'
Backup database CoalTraffic To Disk=@FileName 
With Differential