mysql query to select data per hour -


i trying build query data per hour particular day(or today). have device data table 

#   name                      type           1  : idprimary  --       int(11)                     2 : inputdate   --      varchar(32)      3 : input1      --      varchar(11)          4 : input2      --      varchar(11)

and in inputdate data in format :

select inputdate `devicedata` `inputdate` between '2015-05-29 16:30:07' , '2015-05-29 21:30:07' order id

showing rows 0 - 24 (3304 total, query took 0.3487 seconds.) 

2015-05-29 16:30:09  2015-05-29 16:30:20  2015-05-29 16:30:25  2015-05-29 16:30:41  2015-05-29 16:30:46  2015-05-29 16:30:51  2015-05-29 16:30:56  2015-05-29 16:31:01  2015-05-29 16:31:07  2015-05-29 16:31:49  2015-05-29 16:31:54  2015-05-29 16:32:00  2015-05-29 16:32:10  2015-05-29 16:32:15
want take 1 data in hour, minutes , seconds isn't important.for example :

2015-05-29 5:*:*  2015-05-29 6:*:*  2015-05-29 7:*:*  2015-05-29 8:*:*

i don't know best way this. use regex can't this.

well, hideous, but. try query :)

select * (select substr(inputdate, 1, 13) hours, input1 devicedata order inputdate desc) t group hours;

i might ve messed sorting direction, though/


Comments

Post a Comment

Popular posts from this blog

java - Null response to php query in android, even though php works properly -

Image
table i'm trying retrieve above data using 2 php files below. want pass email parameter , return bets user = email. work fine when tested advanced rest client, problem not php. however, when try through android 2 java classes below, null pointer exception (logcat below) , json object returned null. i'm not sure error is, think i'm not passing parameter php , that's why it's producing null response. logcat 05-31 15:10:50.227 26074-26074/com.example.albert.betterapp e/androidruntime﹕ fatal exception: main process: com.example.albert.betterapp, pid: 26074 java.lang.runtimeexception: unable start activity componentinfo{com.example.albert.betterapp/com.example.albert.betterapp.displayallbets}: java.lang.nullpointerexception @ android.app.activitythread.performlaunchactivity(activitythread.java:2292) @ android.app.activitythread.handlelaunchactivity(activitythread.java:2350) @ android.app.activitythread.acce...
Read more

node.js - Using Node without global install -

i'm working on few node & electron (atom shell) projects , i'm curious how them work without user having install node globally. i've seen few applications including node directory in project contains node.exe binary. how go setting node project use binary? edit: thought should add, i've searched everywhere answer this, unrelated results.
Read more

php - CakePHP HttpSockets send array of paramms -

i problem when make request (i can request). $link = 'http://uri/path/?param1=1&sid=2&sid=3&sid=4' $http = $httpsocket = new httpsocket(); $res = $httpsocket->get($link); if check request pr($http); i see : [line] => /url/path/?param1=1&sid%5b0%5d=2&sid%5b1%5d=3&sid%5b2%5d=4 http/1.1 and i'm getting empty response because server doesn't know parameters sid%5b0%5d=2 when try send parameters array : $data = array('param1' => '1', 'sid' => array('2','3', '4')); i see same changes %5b0%5d - additional indexes. how fix it? unfortunately , can not change server side, if send request in browser, i'll normal response in json format. when make request, can parameters this: $param1 = $_get['param1']; $sid= $_get['sid']; tip: use diferente names parameters. have multiples sid. use sid1, sid2, sid3... update: can parameters this:...
Read more