event_id | title   | start               | end
-----------------------------------------------------------------
0        | title 1 | 2014-10-29 09:00:00 | 2014-10-29 09:30:00
1        | title 2 | 2014-10-29 09:15:00 | 2014-10-29 09:45:00
2        | title 3 | 2014-10-29 10:00:00 | 2014-10-29 10:30:00
2        | title 3 | 2014-10-29 11:00:00 | 2014-10-29 11:30:00

event_id | title   | start               | end                 | conflict
---------------------------------------------------------------------------
0        | title 1 | 2014-10-29 09:00:00 | 2014-10-29 09:30:00 | 1
1        | title 2 | 2014-10-29 09:15:00 | 2014-10-29 09:45:00 | 1
2        | title 3 | 2014-10-29 10:00:00 | 2014-10-29 10:30:00 | 0
2        | title 3 | 2014-10-29 11:00:00 | 2014-10-29 11:30:00 | 0