Question

我有一张桌子，里面有几个小时和那些小时的值。例如：

Hour    Value1    Value2
9       100        1
10      170        4
11       30       17
12      144       59
13        6        1
.
.
.
23       204       8

我需要计算每列的Value1和Value2，但是需要指定的时间段（间隔）。

例如：

00-09h  Value1 = 100, Value2 =  1
09-11h  Value1 = 300, Value2 = 22
11-13h  Value1 = 180, Value2 = 77
13h-21h Value1 = ..., Value2 = ...

我能想到的是为每个间隔创建数组，然后用循环填充它们（检查值是否属于该间隔，然后将其推送到数组）。

但是有更方便有效的方法吗？使用Query？

Answer 1

您可以动态创建包含范围的派生表，并将其与表格连接：

select s.*, sum(t.Value1) as Value1, sum(t.Value2) as Value2
from (
    select 0  as start, 9  as end union all
    select 9  as start, 11 as end union all
    select 11 as start, 13 as end union all
    select 13 as start, 21 as end
) s
join your_table t on t.Hour between s.start and s.end
group by s.start, s.end

Answer 2

使用sum()和whereBetween()：

$model = Model::all();
$totalValue1=$model->whereBetween('hour',[9,11])->sum('value1');
$totalValue2=$model->whereBetween('hour',[9,11])->sum('value2');

$totalValue1=$model->whereBetween('hour',[11,13])->sum('value1');
$totalValue2=$model->whereBetween('hour',[11,13])->sum('value2');

$totalValue1=$model->whereBetween('hour',[13,21])->sum('value1');
$totalValue2=$model->whereBetween('hour',[13,21])->sum('value2');

计算指定时间间隔的列总和

2 个答案: