How do I call a User Defined Function to use with select, group by, order by?

Question

I have Table1 and I need to get it to look like Table2:

Table1

VisitingCount |  Date
-----------------------
      1       |  15:09
      3       |           


        

Answer 1

You can join to your table like a view and have your function call there. That way you can call the group by and order by on the column from the view.

select
    Count(Page) as VisitingCount,
    [Time]
from
(
    SELECT
        Page,
        Date,
        [user],
        dbo.fn_GetActivityLogsArranger(CONVERT(VARCHAR(5),Date, 108)) as [Time]
    FROM
        scr_SecuristLog
) scr_SecuristLog2
where
    Date between '2009-04-30' and '2009-05-02'
and
    [user] in
(
    select
        USERNAME
    from
     scr_CustomerAuthorities
    where
        customerID=Convert(varchar,4)
    and
        ID=Convert(varchar,43)
)
group by
    [Time]
order by
    [Time] asc