Error in query with COUNT expression

Question

Hi
I have a query that returns an error as follows:
"Column Ambiguously defined"
the code is as follows:
SELECT
          ce_family_member.student_id ,
          ce_family_member.last_name ,
          st_enrollment.grade_level ,
          ce_family_member.DATE_OF_BIRTH ,
          ce_family_member.GENDER,
          at_hourly_attendance_records.ABSENCE_REASON_CODE,
          at_hourly_attendance_records.CALENDAR_DATE,
          COUNT(at_hourly_attendance_records.student_id) AS days_absent
          FROM
                  at_hourly_attendance_records,
                  ce_family_member,
                  st_enrollment
          WHERE
          st_enrollment.student_id = at_hourly_attendance_records.student_id
         AND ce_family_member.student_id = st_enrollment.student_id
            AND st_enrollment.school_id = 705
            AND st_enrollment.school_year = 2006
            AND st_enrollment.district_number = 1000
            AND at_hourly_attendance_records.ATTENDANCE_STATUS = 'A'
            AND at_hourly_attendance_records.CALENDAR_DATE < '16-MAR-06'
          GROUP BY student_id; All help is highly appreciated. Thanks very much in advance

Answer 1

Hi
I followed your suggestion. But I still get an error as follows:
Not a Group By Expression. And it points to the second line (ce_family_member)
SELECT
          st_enrollment.student_id ,
          ce_family_member.last_name ,
          st_enrollment.grade_level ,
          ce_family_member.DATE_OF_BIRTH ,
          ce_family_member.GENDER,
          at_hourly_attendance_records.ABSENCE_REASON_CODE,
          at_hourly_attendance_records.CALENDAR_DATE,
          COUNT(st_enrollment.student_id) AS days_absent
          FROM
                  at_hourly_attendance_records,
                  ce_family_member,
                  st_enrollment
          WHERE
          st_enrollment.student_id = at_hourly_attendance_records.student_id
         AND ce_family_member.student_id = st_enrollment.student_id
            AND st_enrollment.school_id = 705
            AND st_enrollment.school_year = 2006
            AND st_enrollment.district_number = 1000
            AND at_hourly_attendance_records.ATTENDANCE_STATUS = 'A'
            AND at_hourly_attendance_records.CALENDAR_DATE < '16-MAR-06'
          GROUP BY st_enrollment.student_id; Thanks a lot for your kind suggestions