mysql - Select date where there is data in-between -


i have todayrainsofar column filled db every minute, , find out maximum duration of rain month, ie when started rain , how long did last.

for example started rain 2014-04-01 @ 08:00 , raining without pause until 2014-04-05 10:00

i have trouble combined queries. 

// select rows when there rain month select logdatetime, todayrainsofar  sibeniku_monthly  todayrainsofar > 0.0 , date_format(logdatetime, "%m.") = 04

now looking count maximum duration of in-between rows (logdatetime datetime , range 1 minute), smth like

and max (count between rows)

the approach used below keep counter of consecutive minutes of rain , row has maximum value of counter (this give maximum duration of consecutive rain). counter reset 0 if rain has ended.

select date_sub(logdatetime, interval counter minute) starttime, logdatetime endtime (   select if(todayrainsofar = 0, @i:=0, @i:=@i+1) `counter`,      logdatetime, todayrainsofar       sibeniku_monthly, (select @i:= 0)   order logdatetime ) t order `counter` desc limit 0,1

working demo: http://sqlfiddle.com/#!2/8578b8/8


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