Select +- 2 minutes with the time-format()

Question

I am trying to select not the exactly arrivaltime from my arrivaltimes table but -+ 2 minutes with this query:

SELECT route from arrivaltimes INNER JOIN stops
 ON arrivaltimes.stop_id=stops.stop_id 
WHERE weekday =  ?
and time_format(arrivaltime,'%H:%i')= time_format(curtime() ,'%H:%i')
and name LIKE ? 

How can I select +- 2 minutes?

Answer 1

If the field arrivaltime is a TIME field, this should work:

SELECT route
FROM arrivaltimes
INNER JOIN stops ON (arrivaltimes.stop_id = stops.stop_id)
WHERE
    weekday =  ?
    AND arrivaltime >= curtime() - INTERVAL 2 MINUTE
    AND arrivaltime <= curtime() + INTERVAL 2 MINUTE
    AND name LIKE ? 

Or you can use the BETWEEN operator:

SELECT route
FROM arrivaltimes
INNER JOIN stops ON (arrivaltimes.stop_id = stops.stop_id) 
WHERE
    weekday =  ?
    AND arrivaltime BETWEEN curtime() - INTERVAL 2 MINUTE AND curtime() + INTERVAL 2 MINUTE
    AND name LIKE ? 

Answer 2

You can simply use BETWEEN....AND and DATE_ADD:

SELECT route 
from arrivaltimes 
INNER JOIN stops ON arrivaltimes.stop_id=stops.stop_id 
WHERE weekday =  ?
and time_format(arrivaltime,'%H:%i') BETWEEN 
    time_format(DATE_ADD(curtime,INTERVAL -2 MINUTE) ,'%H:%i') AND 
    time_format(DATE_ADD(curtime,INTERVAL 2 MINUTE) ,'%H:%i')
and name LIKE ?