MySQL trying to get hourly summary and count on row data -

-

mytable is:

tday   char(3) dow    int(1) tdate  date ttime  time t0     decimal(5,2) t1     decimal(5,2) t2     decimal(5,2) t3     decimal(5,2) total  decimal(8,2)

given above structure , following data:

dow   im     cdate       ctime     g0    g1   g2   g3   thu    4   2010-12-02   05:29:15    1    3    0    11  thu    4   2010-12-02   05:34:22    0    4    1    0  thu    4   2010-12-02   05:39:28    6    0    7    0  thu    4   2010-12-02   05:44:35    8    7    3    9  thu    4   2010-12-02   05:49:41    0    7    0    8  thu    4   2010-12-02   05:54:48    1    7    0    1  thu    4   2010-12-02   05:59:54    3    0    5    3  thu    4   2010-12-02   06:05:01    0    9    1    0  thu    4   2010-12-02   06:10:07    2    9   10    0  thu    4   2010-12-02   06:15:13    0    0   16    0  thu    4   2010-12-02   06:20:20    2    0    8    0  thu    4   2010-12-02   06:25:26    1    0    0    0  thu    4   2010-12-02   06:30:33    1    5   19   21  thu    4   2010-12-02   06:35:39    3    0    6    0  thu    4   2010-12-02   06:40:46    3    4    7    2  thu    4   2010-12-02   06:45:52    3    3    0   20  thu    4   2010-12-02   06:50:58    5    0    7   10  thu    4   2010-12-02   06:56:05    0    7    7    0  thu    4   2010-12-02   07:01:11    7    0   10    3  thu    4   2010-12-02   07:06:18    0    0    0    1  thu    4   2010-12-02   07:11:24    0    0    0    0  thu    4   2010-12-02   07:16:31    9    3    1    0  thu    4   2010-12-02   07:21:37    0    0    3   10  thu    4   2010-12-02   07:26:44    0    1    3    0

what trying sum of columns g0..g3 hour per day.

i have tried "select ctime, sum(g0), sum(g1), sum(g2), sum(g3) mytable group ctime order cdate;" , various statements without getting success. results trying follows:

dow    im   cdate        ctime      g0   g1   g2   g3  thu    4    2010-12-02   05:00:00   19   28   16   32 thu    4    2010-12-02   06:00:00   20   51   86   65 thu    4    2010-12-02   07:00:00   16    4   17   14

could kindly assist. have spent considerable time looking @ submitted solutions , other answers on web nothing comes close think need in particular sql statement required.

thanks. grahame

i think you're looking like

select dow, im, cdate, hour(ctime) recorded_hour, sum(g0) sum_0,      sum(g1) sum)1, sum(g2) sum_2, sum(g3) sum_3 mytable group recorded_hour

if want have hour different dates distinct, have add date column group clause


Comments

Post a Comment

Popular posts from this blog

Javascript line number mapping -

-
magically formatted comments change reported line number of javascript errors in browsers; this: //@line n "f" n line number , f file name. unfortunately, //@line appears ungoogleable. know there documentation on feature, , browsers support it? (i found references here , here .) from can find available in mozilla based browsers. it using js_setoptions command can turn these options on or off depending on values passed. https://developer.mozilla.org/en/js_setoptions
Read more

c# - Is it possible to remove an existing registration from Autofac container builder? -

-
something along lines: builder.registertype<mytype>().as<itype>(); builder.registertype<mytype2>().as<itype>(); builder.deregistertype<mytype>().as<itype>() var container = builder.build(); var types = container.resolve<ienumerable<itype>>(); assert.istrue(types.count == 1); assert.istrue(types[0].gettype == typeof(mytype2)); scenario: go through bunch of assemblies , go register types want make sure have 1 implementation of given type. need before create container. track on own nice if autofac me bit. this cannot done directly using containerbuilder , unless start on new one. mind you, having first built container should able construct new container filtering away unwanted types , reusing registrations first container. this: ... var container = builder.build(); builder = new containerbuilder(); var components = container.componentregistry.registrations .where(cr => cr.activator.limittype != typ...
Read more

php - Mysql PK and FK char(36) vs int(10) -

-
i have read mysql can handle indexes , searches better if tables keys integers rather char(36) uuid's. is worth converting int(10)? note: use 1 server , have have plans use multiple databases concurrently therefore removing 1 of big reasons using uuid. our tables innodb if makes difference. thanks in advance. usually rdbms can handle integer keys pk more efficient, other datatypes. reason how build index column, yes: long dont require string (or other typed) keys, should use integers. however: char(36) , int(10) far away being equal, because int(10) much smaller, char(36). dont know, if require many different keys, should keep in mind. update, complete last paragraph: int(10) 32-bit, char(36) 36 - ^byte^ (= 288-bit). not mean, int consumes less space, means, char(36) has 4 times more different keys.
Read more