Question

我想在饼图中显示员工数据。我能够使用jQuery和php制作饼图。但需求是在一个页面中有12个按钮。姓名1月至12月。

当用户点击feb时，会向用户显示feb的饼图。点击dec dec饼图。向用户显示。

在我的数据库中有一个date列，其中存储日期，如2015-06-23

我无法获得SQL查询的逻辑，这是我的代码，但需要改进。

<html>
  <head>
    <!--Load the AJAX API-->
    <script type="text/javascript" src="https://www.google.com/jsapi"></script>
    <script type="text/javascript">

      // Load the Visualization API and the piechart package.
      google.load('visualization', '1.0', {'packages':['corechart']});

      // Set a callback to run when the Google Visualization API is loaded.
      google.setOnLoadCallback(drawChart);

      // Callback that creates and populates a data table,
      // instantiates the pie chart, passes in the data and
      // draws it.
      function drawChart() {

        // Create the data table.
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows
        ([
          <?php

            $servername = "localhost";
            $username   = "root";
            $dbname     = "dat_database";
            $password   = "";
            $conn       = new mysqli($servername, $username, $password, $dbname);
            $EMP_ID  = 'MMUM254';
            $sql        = "SELECT  typeof_task,hourspend from emp_dat_info where EMP_ID='" . $EMP_ID. "'  ORDER BY date DESC LIMIT 10 " ;
            $result     = $conn->query($sql);
            if ($result->num_rows > 0) {
                            while ($row = $result->fetch_assoc()) {
                                $a[] = "['" . $row["typeof_task"] . "', " . $row["hourspend"] . "]";
                }
                echo implode(', ', $a);

}

?>

        ]);

        // Set chart options
        var options = {'title':'How Much Hours You Spend',
                       'width':900,
                       'height':500};

        // Instantiate and draw our chart, passing in some options.
        var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>

  <body>
    <!--Div that will hold the pie chart-->
    <div id="chart_div"></div>
  </body>
</html>
<?php echo date("Y"); ?>

`

Answer 1

您可以在代码中尝试使用month子句来获取月份数据

$sql = "SELECT  typeof_task,hourspend 
        FROM emp_dat_info 
        WHERE EMP_ID='" . $EMP_ID. "'  
        ORDER BY MONTH(date) DESC LIMIT 10 " ;
        $result     = $conn->query($sql);

Answer 2

如果要获取月份的全名，可以在查询中尝试MONTHNAME子句。在MONTHNAME子句中传递日期。

$sql = "SELECT  typeof_task,hourspend 
        FROM emp_dat_info 
        WHERE EMP_ID='" . $EMP_ID. "'  
        ORDER BY MONTHNAME(date) DESC LIMIT 10 " ;
        $result     = $conn->query($sql);

有关详情，请访问以下链接：https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_month

Answer 3

尝试使用日期

的MONTH

$sql = "SELECT  typeof_task,hourspend 
            FROM emp_dat_info 
            WHERE EMP_ID='" . $EMP_ID. "'  
            ORDER BY MONTH(date) DESC LIMIT 10 " ;
            $result= $conn->query($sql);

根据月份显示数据

3 个答案: