sql - Sqlite: Get Modal/Mode from two related columns -


this extract table games:

id  wuser       buser 1   ddyer       bdot 2   ddyer       ronaldinho 3   bluedog     ronaldinho 4   ronaldinho  bluedog 5   bluedog     ronaldinho 6   ddyer       bobc 7   bobc        ddyer

the table database website boardspace.net in people play board games. in database wuser , buser white , black players, , id game played. want know players played most. white players:

 select wuser, count(wuser)   game   group wuser   order count(wuser) desc;

result is:

wuser    count(wuser) dumbot   75926 guest    22541 image13  1594 drraven  1460 eucalyx  1147 loizz    963

then have same black players:

 select buser, count(buser)   game   group buser   order count(buser) desc;  buser    count(buser) dumbot   59489 guest    29324 eucalyx  1007 image13  756 drraven  746 loizz    715 alexis   660

i can sum manually did below, how result single sql statement: 

user     count(as both buser , wuser) dumbot   135412 guest    51865 image13  2350 drraven  2206

i want know total number of games played each player, not interested whether play white or black.

as got large number of rows per user better count before union , add aggregate step:

select usr, sum(cnt)  (    select wuser usr, count(*) cnt    game     group wuser     union     select buser, count(*)     game     group buser  ) dt  group usr  order sum(cnt) desc;

Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

php - Nothing but 'run(); ' when browsing to my local project, how do I fix this? -

i added new project. made mistake in projectname.conf file in sites-available apache2, led me reinstalling apache2. after reinstalling , re-enabling projects on every page of every project .. <body> run(); </body> .. i've run composer update, restarted service, restarted pc, checked config files, tried disabling new project. there nothing in error log, , access.log: 127.0.0.1 - - [15/may/2015:01:40:47 +0200] "get / http/1.1" 304 181 "-" "mozilla/5.0 (x11; ubuntu; linux x86_64; rv:38.0) gecko/20100101 firefox/38.0" maybe i'm forgetting apache2 reinstall? don't think did different last time installed it. looks haven't setup php correctly. take @ this great guide , maybe you're forgetting link php config apache2.
Read more

php - How can I echo out this array? -

i don't know how go grabbing data in variable , put foreach loop. class tree{ private $info = array( array('name'=>'jim','state'=>'nu','company'=>'nu','phone'=>array('cell'=>'5615111111','office'=>'5611111111'),'email'=>array('primary'=>'exs@example.com','ex@there.com')), array('name'=>'joe smith','city'=>'phoenix','phone'=>'4805551111','email'=>'jsmith@some_email.com'), array('name'=>'john doe','city'=>'chandler','company'=>'doe co.','email'=>array('jdoe@gmail.com','personal'=>'email@email.com'),'phone'=>'6025550002') ); } if you're inside of class, can access private variable using $this->variablename . example, i
Read more