Question

In MS Access, I have a query where I want to use a column in the outer query as a condition in the inner query:

SELECT P.FirstName, P.LastName, Count(A.attendance_date) AS CountOfattendance_date,        First(A.attendance_date) AS FirstOfattendance_date,        (SELECT COUNT (*)            FROM(SELECT DISTINCT attendance_date                  FROM tblEventAttendance AS B                  WHERE B.event_id=8                    AND B.attendance_date >= FirstOfattendance_date)        ) AS total FROM tblPeople AS P INNER JOIN tblEventAttendance AS A ON P.ID = A.people_id WHERE A.event_id=8 GROUP BY P.FirstName, P.LastName ; 

The key point is FirstOfattendance_date – I want the comparison deep in the subselect to use the value in each iteration of the master select. Obviously this doesn’t work, it asks me for the value of FirstOfattendance_date when I try to run it.

I’d like to do this without resorting to VB code… any ideas?

Answer 1

How about:

SELECT       p.FirstName,      p.LastName,      Count(a.attendance_date) AS CountOfattendance_date,      First(a.attendance_date) AS FirstOfattendance_date,      c.total FROM (      tblPeople AS p  INNER JOIN tblEventAttendance AS a ON       a.people_id = p.ID)  INNER JOIN (SELECT people_id, Count (attendance_date) As total             FROM (                 SELECT DISTINCT people_id,attendance_date                 FROM tblEventAttendance)              Group By people_id) AS c ON       p.ID = c.people_id GROUP BY       p.ID, c.total;