How to compress DB backup file with sql query

I backup my database with this query:

USE DBName

GO

DECLARE @FileName VARCHAR(MAX)

SET @FileName = 'C:\Backup\SQLDB\DBName_'+ REPLACE(CONVERT(varchar(10),getdate(),103),'/','') + '_' + REPLACE(CONVERT(varchar(10),getdate(),108),':','') + '.Bak'

BACKUP DATABASE DBName

TO DISK = @FileName

WITH FORMAT,

NAME = 'Full Backup of DBName'

GO

I execute this query with a batch file and batch file runs by schedule task.

batch file parameters:

sqlcmd -d DBName -S .\SQLEXPRESS -I -U DBUserName -P DBUserPwd -i SQL_FileName_with_Extension -o log.txt

It successfully backup my database on daily basic and I got backup file with 'DBName_01082014_131210.bak' name. But it's size is too high (around 7GB). Is there any sql query which executes with above query and which can backup and compress my DB at the same time?