Can it not possible that i can retrive it for all line items in a single qu

Question

I have to make report for my application in which I am facing a following problem:
In the application there are multiple suppliers and each supplier having multiple line items and each item having multipale events. each evant having three status GREEN,RED and BLUE.
When a user select 'all suppliers' to show the the status time span for a supplier (i.e. for a supplier how many parts and upto how much time parts are in blue, red and green status)
to show the cumulative status time span I have to find out a event for each line item which is having nearest lower entry time from the lower part of the given time span.for this i have write following query
SELECT * FROM parts_events
WHERE vendorid = ? AND partid = ?
AND visible = 'visible' AND active = 1
AND entrytime = (SELECT MAX(entrytime) as
entrytime from parts_events
WHERE vendorid = ?
AND partid = ?
AND entrytime < ?
AND visible = 'visible'
AND active = 1)
the problem is that i have to fire this query for each line item, can it not possible that i can retrive it for all line items in a single query?

Answer 1

maybe if you can post some sample data and output will help us analyze more youre requirement.