Easiest way to get a total count and a count of a subset?

Question

I was trying to do this:

SELECT COUNT(*),
        (
            SELECT COUNT(*) FROM attend
            WHERE (DATEPART(WEEKDAY,start_date) = 2 OR DATEPART(WEEKDAY,start_date) = 6)
            AND empl_no = 12345
        )
        FROM attend as a
 WHERE empl_no = 12345

But this seems a little ugly. Is there a better way to do this?

Answer 1

Use:

SELECT COUNT(*) AS total,
       SUM(CASE 
             WHEN DATEPART(WEEKDAY, t.start_date) IN (2,6) THEN 1 
             ELSE 0 
           END) AS weekday
  FROM ATTEND t
 WHERE t.empl_no = 12345