Charts 如何在条形图/SQL中显示值

我需要把这些值​​在条内或条外，但我需要您向我显示值，我已经看到了一些示例，但是数组表有不止一行的值​​放在手里，但我的通过SQL连接

如何放置这些值​​在我的柱状图上

一个用户向我展示了这个答案，但是在“var data=google.visualization.arrayToDataTable”中 它返回值​​在行中

  google.setOnLoadCallback(drawChart);

function drawChart() {
    var data = google.visualization.arrayToDataTable([
        ['Descr', 'Downlink', 'Uplink'],
        ['win7protemplate', 12, 5],
        ['S60', 14, 5],
        ['iPad', 3.5, 12], ]);

var options = {
    colors: ['#00544d'],
    width: 500,
    height: 250

  }; 

        options.legend = 'none';

    var chart = new google.visualization.BarChart(document.getElementById('chart_demanda'));
    chart.draw(data,options);
  }

但我的每个帐户只有一行从MySQL获取此值

          google.load("visualization", "1", {packages:["barchart"]});
      google.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable([
       ['quantidade_demanda','COUNT(Subclasse)'],

 <?php 

    $query = "SELECT COUNT(Subclasse), Subclasse AS quantidade_demanda FROM demandas_portal WHERE Categoria = 'Demanda Ambiental' GROUP BY Subclasse";



 $exec = mysqli_query($con,$query);
 while($row = mysqli_fetch_array($exec)){

 echo "['".$row['quantidade_demanda']."',".$row['COUNT(Subclasse)']."],";
 }
 ?> 

        ]);

---

如果您指的是在条形图上显示注释，
您需要向数据表中添加另一列，
正在使用批注角色

将注释角色添加到列标题，此处

  ['quantidade_demanda','COUNT(Subclasse)', {role: 'annotation', type: 'string'}],  // <-- add annoation role to column heading

echo "['".$row['quantidade_demanda']."',".$row['COUNT(Subclasse)'].",'".$row['COUNT(Subclasse)']."'],";  // <-- add value of annotation, repeat column value as string

---

['quantidade_demanda'，'COUNT（subasse）'，{role:'annotation'，type:'string'}]，//如果您指的是在条形图上显示批注，

您需要向数据表中添加另一列，

正在使用批注角色

将注释角色添加到列标题，此处

  ['quantidade_demanda','COUNT(Subclasse)', {role: 'annotation', type: 'string'}],  // <-- add annoation role to column heading

echo "['".$row['quantidade_demanda']."',".$row['COUNT(Subclasse)'].",'".$row['COUNT(Subclasse)']."'],";  // <-- add value of annotation, repeat column value as string

['quantidade_demanda'，'COUNT（subasse）'，{role:'annotation'，type:'string'}]//