Power Query under Power BI desktop create/add column for count of grouping

If I was doing this in SQL it would be something like this:

with ay_count as
   (select assetNo, yearweek, count() as assetWeek_WO_count
    from workorder
   group by assetno, yearweek  )

select wo.assetNo, wo.yearweek, wo.col1, wo.col2, wo.col3,.... assetWeek_WO_count
* from workorder wo, ay_count
where wo.assetNo = ay_count.assetNo and
wo.yearweek = ay_count.yearweek

As per my last reply to Shahariar, I believe I have the first select working in Power Query.

How is the second Select statement above done?

Thanks for your kind assistance.

KD