Grouping Data in MS Access 2010 based on multiplication - mysql

Question

I am a new user to MS Access.
My table has 2 columns: a column for number of days which goes from 0 to 150+ and a column for principal paid (any number say 858576)
There are over 70000 rows.
Row 1 says 70 days and principal paid as 898956
Row 2 says 68 days and principal paid as 13751
Row 3 says 190 days and principal paid as 397159
Row 4 says 11 days and principal paid as 56978
Row 5 says 29 days and principal paid as 9078910
I want a query to return records from 0-30 days, 30-60 days, 60-90 days, 90-120 days, 120-150 days and 150 above and showing sum of principal against each group mentioned above. Can it be done? If so, how?

Answer 1

If you know the maximum number of your days in the table and criteria for dividing into groups, you could try by using the case:
SELECT
SUM(principal_paid),
days_range
FROM
(
SELECT
principal_paid,
CASE days
WHEN BETWEEN 0 AND 30
THEN '0-30'
WHEN BETWEEN 31 AND 60
THEN '31-60'
WHEN BETWEEN 61 AND 90
THEN '61-90'
WHEN BETWEEN 91 AND 120
THEN '91-120'
WHEN BETWEEN 121 AND 150
THEN '121-150'
ELSE 'over 150'
END AS days_range
FROM
yourtable
)
as T
GROUP BY
days_range