在我的数据库中有Transaction表。此表包含有关用户资金交易的信息。我的任务是生成两个图表(图表),显示每天和每月的交易金额。
我应该实现的图表示例显示在下图中:
从图中可以看出,当每天没有交易时,总价值应为0.
在数据库中,我使用以下查询按天分组我的交易:
select DATE_FORMAT(t.transactionDate ,"%b %d") as dayName, sum(t.amount) total from `Transaction` t, t.transactionStatus = 1 and t.user=17
group by dayName
order by t.transactionDate asc;
当每天都有交易时,这就像魅力一样,但是当有一天没有任何交易时,这种方法并不正常。让我们在DB中说我们有以下交易:
May 1st 20$
May 1st 30$
May 1st 38$
May 2nd 20$
May 4th 100$
May 4th 50$
所以5月3日没有交易。
当我对这些交易进行分组时,我得到以下结果:
May 1st 88$
May 2nd 20$
May 4th 150$
我现在想要的是生成May 3rd 0$
。是否可以直接在DB中执行,或者我必须使用PHP处理它?</ p>
如果我必须使用PHP处理它,任何想法?
使用Chart JS库绘制I&#39;以下是数据输入示例:
var areaChartData = {
labels: ["May 01", "May 02", "May 04"],
datasets: [
{
label: "Transactions",
fillColor: "rgba(210, 214, 222, 1)",
strokeColor: "rgba(210, 214, 222, 1)",
pointColor: "rgba(210, 214, 222, 1)",
pointStrokeColor: "#c1c7d1",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(220,220,220,1)",
data: [88,20,150]
},
]
};
正如您所看到的,我的想法是直接在图表中使用数据库中的值,其中事务日期是我的X轴,而total是我的Y轴。
答案 0 :(得分:1)
一种方法是,首先将所有可能的日期和值作为PHP数组:
$labels = array(
"May 1st" => 0,
"May 2nd" => 0,
"May 3rd" => 0,
"May 4th" => 0,
"May 6th" => 0,
"May 6th" => 0,
....
);
然后将数据库中的所有值填充到数组中的相应日期键
...
foreach ( $rows as $row )
{
$labels[$row['date']] = $row['agg_val'];
...
现在,您可以迭代$labels
数组并输出值。那些不在DB(无事务)中的那些被初始化为零。
答案 1 :(得分:1)
查看您的查询,它会生成 //this one causes php run error
$collection->update(array("scienceNumber"=>$scienceNumber), array('$push'=>array(array("comments"=> $comment), array("ids"=> $userID), array("times"=> $time))), array("upsert"=>true));
//this one runs a query but only pushes $time onto the times array, ignoring the other push instructions
//that outcome totally makes sense since I am assigning all these different arrays to the same key...no complaints...but then the above didn't work either
$collection->update(array("scienceNumber"=>$scienceNumber), array('$push'=>array("comments"=> $comment), '$push'=>array("ids"=> $userID), '$push'=>array("times"=> $time) ), array("upsert"=>true));
,如下所示,
$result
此脚本将为chartdata准备数组,
array (size=3)
0 =>
array (size=2)
'dayName' => string 'May 01' (length=6)
'total' => int 88
1 =>
array (size=2)
'dayName' => string 'May 02' (length=6)
'total' => int 20
2 =>
array (size=2)
'dayName' => string 'May 04' (length=6)
'total' => int 150
现在,您的$begin = reset($result) ['dayName']; // 1st date in result
$end = end($result) ['dayName']; // last date in result
$begin = new DateTime($begin);
$end = new DateTime($end);
$end->modify('+1 day');
$interval = DateInterval::createFromDateString('1 day');
$period = new DatePeriod($begin, $interval, $end);
function search($input, $day)
{
foreach($input as $k => $v)
{
if ($v['dayName'] == $day) return $k;
}
return false;
}
$chartdata = []; // array for chartdata
foreach($period as $dt) // loop for everyday from 1st to last day
{
$format = $dt->format('M d');
$flag = search($result, $dt->format('M d'));
$chartdata[$format] = is_int($flag) ? $result[$flag]['total'] : 0;
}
包含交易表中缺少的一天$chartdata
。
现在,将其用作
May 03
和
labels: <?php echo json_encode(array_keys($chartdata))?>,