Question

我有如下数据。我必须根据用户选择总结从7月开始到当前月份或任何月份的每个元素的每个月值。我不知道我是否应该在PHP中使用for或while循环。希望有人能指出我正确的方向。

Element | Jan | Feb | Mar |Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dis
==============================================================================
A       | 78  | 65  | 44   |67 | 76  | 88  | 66  | 65  | 87  | 90  | 56  | 70
B       | 78  | 65  | 44   |67 | 76  | 88  | 66  | 65  | 87  | 90  | 56  | 70
C       | 78  | 65  | 44   |67 | 76  | 88  | 66  | 65  | 87  | 90  | 56  | 70

查询

$sql2 = "Select element,
SUM(CASE WHEN Month = 'Jan' THEN total ELSE 0 END ) AS Jan,
SUM(CASE WHEN Month = 'Feb' THEN total ELSE 0 END ) AS Feb  //until Dec
FROMtbl_ma GROUP BY element";
$rs2 = mysql_query($sql2);
$getRec2 = mysql_fetch_assoc($rs2);

打印

while ($row = mysql_fetch_assoc($rs2)) {    
echo $row['Jan'] //until Dec
}

Answer 1

最简单的可能就是使用

array_sum()

函数，它将汇总数组中的所有值：http://php.net/manual/en/function.array-sum.php

PHP中元素的求和值

1 个答案: