Question

I have a table with three fields, namely id (Primary Key), start_date (Date) and no_of_days (Int). I need to fetch the results from this table in such a way that after adding no_of_days days to start_date the resultant date should be less than the current date.

For example, if we have this row in table

id     start_date    no_of_days
8      2011-08-19       10  

If we add 10 (no_of_days) to 2011-08-19 (start_date) then the resultant date will be 2011-08-29 and it is also less than current date so this entry should be fetched.

How can I do this using a MySQL query?

Answer 1

SELECT
  *
FROM
  table
WHERE
  start_date + INTERVAL no_of_days DAY < CURRENT_DATE

Or even better, an equivalent query which can use an index on the start_date column by rearranging:

SELECT
  *
FROM
  table
WHERE
  start_date < CURRENT_DATE - INTERVAL no_of_days DAY