mysql time select where compare - mysql

Question

mysql datetime select problem.
my table check_time:
count = 1
start = 23:57:45
end = 00:02:10
count = 2
start = 00:02:45
end = 00:07:10
i tried this query:
select count
from check_time
where start <= DATE_FORMAT(now(), '%H:%i:%s')
and end >= DATE_FORMAT(now(), '%H:%i:%s');
i want the now() = "23:57:45" between "00:02:10" select -> count = 1
not working on count 1 only.
but working perfectly other count 2~100..
sorry for my bad english.

Answer 1

A great deal depends on how you have actually defined the columns start and end. I have assumed they are "time" columns in the following.
Also note that to avoid the problem of using the server time which I could not control I have used #curtime but in your code you should use CURTIME() instead. See the demonstration demonstration at SQL Fiddle
CREATE TABLE check_time
(`count` int, `start` time, `end` time)
;
INSERT INTO check_time
(`count`, `start`, `end`)
VALUES
(1, '23:57:45', '00:02:10'),
(2, '00:02:45', '00:07:10')
;
Query 1:
set #curtime:= cast('23:57:45' as time)
select
*
, #curtime
from check_time
where (
(`start` < `end` and #curtime between `start` and `end`)
OR (`start` > `end` and
(#curtime between `start` and cast('24:00:00' as time) )
OR (#curtime between cast('00:00:00' as time) and `end` )
)
)
Results:
| count | start | end | #curtime |
|-------|----------|----------|----------|
| 1 | 23:57:45 | 00:02:10 | 23:57:45 |
Query 2:
set #curtime:= cast('00:02:45' as time)
select
*
, #curtime
from check_time
where (
(`start` < `end` and #curtime between `start` and `end`)
OR (`start` > `end` and
(#curtime between `start` and cast('24:00:00' as time) )
OR (#curtime between cast('00:00:00' as time) and `end` )
)
)
Results:
| count | start | end | #curtime |
|-------|----------|----------|----------|
| 2 | 00:02:45 | 00:07:10 | 00:02:45 |