Question

I am trying to do a point in time query to return the quantity last recorded in that point in time.

Basically I have a table formatted as such

id | other_id | quantity | created
 1     1           5       20
 2     1           2       22
 3     1           1       25
 4     1           8       90

If the created queried was 60 I want to return the quantities for the created of 25 and higher
Or from the most recently known quantity since the queried created.

SELECT * FROM table
WHERE created >= 60
AND other_id = 1
ORDER BY ID ASC

Which returns ID:4 but I want the created at 60 which was ID:3
But if the queried created was 25 I want to return 25 and greater

Brain is fried atm and unable to come up with a correct solution

Answer 1

This query selects the value before the value you want:

SELECT MAX(created)
FROM yourtable
WHERE other_id = 1
AND created <= 60

You can then use this as a subquery inside your main query:

SELECT *
FROM yourtable
WHERE created >=
(
    SELECT IFNULL(MAX(created), -1)
    FROM yourtable
    WHERE other_id = 1
    AND created <= 60
)
AND other_id = 1
ORDER BY ID ASC