MySQL中实现连续日期内数据统计,缺省天数0补全

某一日，需要查询订单表中一个月每天的金额数

查询出数据如下:

array(14) {
  [0] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "12"
  }
  [1] => array(2) {
    ["money"] => string(7) "6000.00"
    ["times"] => string(2) "14"
  }
  [2] => array(2) {
    ["money"] => string(8) "31569.00"
    ["times"] => string(2) "15"
  }
  [3] => array(2) {
    ["money"] => string(9) "134596.50"
    ["times"] => string(2) "16"
  }
  [4] => array(2) {
    ["money"] => string(7) "4000.00"
    ["times"] => string(2) "17"
  }
  [5] => array(2) {
    ["money"] => string(8) "20525.00"
    ["times"] => string(2) "18"
  }
  [6] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "20"
  }
  [7] => array(2) {
    ["money"] => string(7) "6000.00"
    ["times"] => string(2) "21"
  }
  [8] => array(2) {
    ["money"] => string(7) "9000.00"
    ["times"] => string(2) "22"
  }
  [9] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "23"
  }
  [10] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "25"
  }
  [11] => array(2) {
    ["money"] => string(7) "7000.00"
    ["times"] => string(2) "26"
  }
  [12] => array(2) {
    ["money"] => string(8) "10000.00"
    ["times"] => string(2) "27"
  }
  [13] => array(2) {
    ["money"] => string(9) "212263.28"
    ["times"] => string(2) "28"
  }
}

只查询了14天的数据,而且中间还有几天没有数据,但是我想要没查询的天数显示为0,这个时候就需要先给数据加个起点!如果没有1号,我们就把一号加上,有就略过! 然后还要加个终点,终点应放在原始数组中，不然算法不可能自作主张的添加数据,我这里默认每个月31号,毕竟要做折线统计图,日期是固定的,方法如下:

          if ($list[0]['times'] !=1){
                 array_unshift($list,array('money' => '0', 'times' =>'01')); //这样就添加了起点
             }

             if ($list[count($list)-1]['times'] !=31){
                 $list[] = array('money' => '0', 'times' => '31');//这样就添加了终点
             }

             $last = '1';

             foreach($list as $r) {
                 while($last && $last < $r['times']) {
                     $res[] = array('money' => '0','times' => "$last");

                     $last +=1;
                 }
                 $res[] = $r;
                 $last +=1;
             }

 //            $res就是最终的结果
             dump($res);

结果如下:

array(31) {
  [0] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "01"
  }
  [1] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "2"
  }
  [2] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "3"
  }
  [3] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "4"
  }
  [4] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "5"
  }
  [5] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "6"
  }
  [6] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "7"
  }
  [7] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "8"
  }
  [8] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(1) "9"
  }
  [9] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "10"
  }
  [10] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "11"
  }
  [11] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "12"
  }
  [12] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "13"
  }
  [13] => array(2) {
    ["money"] => string(7) "6000.00"
    ["times"] => string(2) "14"
  }
  [14] => array(2) {
    ["money"] => string(8) "31569.00"
    ["times"] => string(2) "15"
  }
  [15] => array(2) {
    ["money"] => string(9) "134596.50"
    ["times"] => string(2) "16"
  }
  [16] => array(2) {
    ["money"] => string(7) "4000.00"
    ["times"] => string(2) "17"
  }
  [17] => array(2) {
    ["money"] => string(8) "20525.00"
    ["times"] => string(2) "18"
  }
  [18] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "19"
  }
  [19] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "20"
  }
  [20] => array(2) {
    ["money"] => string(7) "6000.00"
    ["times"] => string(2) "21"
  }
  [21] => array(2) {
    ["money"] => string(7) "9000.00"
    ["times"] => string(2) "22"
  }
  [22] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "23"
  }
  [23] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "24"
  }
  [24] => array(2) {
    ["money"] => string(7) "2000.00"
    ["times"] => string(2) "25"
  }
  [25] => array(2) {
    ["money"] => string(7) "7000.00"
    ["times"] => string(2) "26"
  }
  [26] => array(2) {
    ["money"] => string(8) "10000.00"
    ["times"] => string(2) "27"
  }
  [27] => array(2) {
    ["money"] => string(9) "212263.28"
    ["times"] => string(2) "28"
  }
  [28] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "29"
  }
  [29] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "30"
  }
  [30] => array(2) {
    ["money"] => string(1) "0"
    ["times"] => string(2) "31"
  }
}

同样的. 12个月也可以这样操作,只要把终点改为12就可以了