Grouping Consecutive Values by Min and Max

[MCTampa]

I have the following table for which I would like to create groups of consecutive weeks by min and max values.

AREA Code	Week
330	1
330	2
330	3
330	4
330	33
330	34
330	35
330	36
330	37
330	38
330	39
330	40
330	41
330	42
330	43
330	44
330	45
330	47
330	48
330	49
330	50

<caption> Automatics </caption><thead>
</thead><tbody>
</tbody><tfoot></tfoot>

The end result I would like is:

Area Code	Week Start	Week End
330	1	4
330	33	45
330	47	50

<colgroup><col><col><col></colgroup><tbody>
</tbody>

I'm trying to write this in SQL but many of the solutions I've found online reference using the ROW_NUMBER() function which Access does not recognize.

Can someone please help me out?
Thanks

 

[MCTampa]

Note: This is relative to the area. So the groupings for area 330 will be independent of another area, but the logic will remain the same.

 

[MCTampa]

Got the answer at Stack Overflow.
Thanks anyway!

<code>select area, min(week), max(week)
from (select t.*,
(select count(*)
from t as t2
where t2.area = t.area and t2.week <= t.week
) as seqnum
from t
) as t
group by area, (week - seqnum);</code>