query > on day in the future

Hello,

Can anyone help me with this little problem. I have a query :

{exp:query sql="SELECT * FROM exp_channel_grid_field_2 WHERE 
col_id_6 > {current_time} ORDER BY col_id_6 ASC;" }

<span class="date">{col_id_6 format="[%d/%m/%Y]"}</span> 


{/exp:query}

in the code above col_id_6 is an event-date, if event date > {current_time) the event is displayed

now i want something to have like : if event date > {current_time + 1 week) (so display the event till current time + one week)

Any advice ???

THX Koen