mysql - Complex query using sql in php -


i have question,

i need create complex select query , can't :

so have multiples databases call cluster1,cluster2,cluster3,...,cluster10,

every cluster have table call games. , need of rows clusters in last 7 days. tried this:

foreach ($adatabases $database) {    $sflashparties = sprintf('        select left(depart, 10) date, count(*) nb         `%s`         duree>0 , depart         between current_date()-7 , current_date()         group date', $sflashtablename);    $r_count = mysqli::query($sflashparties, $database);    $a_row = $r_count->fetch_array(mysqli_assoc);    error_log(print_r($a_row,true), 3, "/tmp/error.log"); }

the result need : 

day       nb_total

can me please? thx in advance

given single connection host multiple databases, build , execute query string below.

note using backtick operator indicate database.table location.

edit: taking first result each query, fix doing this:

<?php  $databases = array("cluster1","cluster2","cluster3","cluster10");  foreach ($databases $db) {     $sflashtablename = '`' . $db . '`.`games`';     print sprintf('select left(depart, 10) date, count(*) nb         %s         duree>0 , depart         between date_sub(curdate(), interval 7 day) , curdate()         group date', $sflashtablename) . php_eol;      // execute query in loop , store results in array     // parse array later , aggregate results     // $totals[] = queryresult;      $r_count = mysqli::query($sflashparties, $database);      while($a_row = $r_count->fetch_array(mysqli_assoc);){         $rows[] = $row; // add every result line databases 1 single array         $rows[$$db][] = $row; // not tested!, should give similar $rows[cluster2] = array($a_row['date'],$a_row['nb']);     } }  /* select left(depart, 10) date, count(*) nb        `cluster1`.`games`        duree>0 , depart        between date_sub(curdate(), interval 7 day) , curdate()        group date select left(depart, 10) date, count(*) nb        `cluster2`.`games`        duree>0 , depart        between date_sub(curdate(), interval 7 day) , curdate()        group date select left(depart, 10) date, count(*) nb        `cluster3`.`games`        duree>0 , depart        between date_sub(curdate(), interval 7 day) , curdate()        group date select left(depart, 10) date, count(*) nb        `cluster10`.`games`        duree>0 , depart        between date_sub(curdate(), interval 7 day) , curdate()        group date */

you can choose results next.


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