SQL date intervals query

Question

I am managing an event database. Every event has a start and end timestamp (INT, unix timestamp).

Currently i\'m able to do the following things with a sing

Answer 1

When you want to query all events "today" (or some other date), event those starting in the past or "today" and ending "today" or in the future you need some query like:

SELECT * FROM `event` WHERE 
   (`start` >= :start) AND (`end` <= :end) OR
   (`start` <= :end) AND (`end` >= :start)
ORDER BY start ASC

with ? being your actual date.

Test data:

123456789
   nn     <-- :start, :end
 xx       1 
      xx  2 
  xx      3 s
    xx    4 s
  xxxx    5 s
   xx     6 s

Test query:

select * from event where 
(start >= 4 and end <= 5) or
(start <= 5 and end >= 4)

Answer 2

If I get the question right, with [:start, :end] being your date range of interest, you're looking for:

select *
 from event
where -- event started earlier, ends later
      start <= :start and :start <= end
   or -- event starts during [:start, :end]
      :start <= start and start <= :end
   or -- event ends during [:start, :end]  
      :start <= end and end <= :end;

If you're looking for a particular :day, use :day as :start and :day + 1 day as :end.

Answer 3

I think you should modify query like this:

SELECT * FROM `event` WHERE ? BETWEEN `start` AND `end` ORDER BY start ASC

where param ? is the current date or current timestamp.