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POHow to Use sql queries to draw dynamic chart in NV D3?
 

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  1. POHow to Use sql queries to draw dynamic chart in NV D3?
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    <p>The below code for horizontal bar chart works well but now i need to retrieve data from sql database accordingly the chart should change dynamically, so where could i insert sql queries in this code and what is the format please help me guys.</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;meta charset="utf-8"&gt; &lt;head&gt; &lt;link href="Scripts/nv.d3.css" rel="stylesheet" type="text/css"&gt; &lt;script src="Scripts/d3.v3.js"&gt;&lt;/script&gt; &lt;script src="Scripts/nv.d3.js"&gt;&lt;/script&gt; &lt;script src="Scripts/utils.js"&gt;&lt;/script&gt; &lt;script src="Scripts/tooltip.js"&gt;&lt;/script&gt; &lt;script src="Scripts/models/axis.js"&gt;&lt;/script&gt; &lt;script src="Scripts/models/multiBarHorizontal.js"&gt;&lt;/script&gt; &lt;script src="Scripts/models/multiBarHorizontalChart.js"&gt;&lt;/script&gt; &lt;script src="Scripts/bar.js"&gt;&lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="chart" style="height:700px"&gt; &lt;svg&gt; &lt;/svg&gt; &lt;/div&gt; &lt;script&gt; d3.json("data.json",function(error,data){ var chart; nv.addGraph(function() { chart = nv.models.multiBarHorizontalChart() .x(function(d) { return d.label }) .y(function(d) { return d.value }) .margin({top: 30, right: 20, bottom: 50, left: 175}) .showValues(true) .tooltips(false) .showControls(false); chart.yAxis .tickFormat(d3.format(',.0f')); d3.select('#chart svg') .datum(data) .transition().duration(500) .call(chart); nv.utils.windowResize(chart.update); chart.dispatch.on('stateChange', function(e) { nv.log('New State:', JSON.stringify(e)); }); return chart; }); }); &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Here is my data.json</p> <pre><code>{"values":[ {"label":"Alaska","value":3}, {"label":"Alabama","value":4}, {"label":"Arkansas","value":5}, {"label":"Arizona","value":7}, {"label":"California","value":8}, {"label":"Colorado","value":9}, {"label":"Missouri","value":31}]} </code></pre>
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    1. COOne way to do this is would be to replace the `var data = ...` section with a data import function such as `d3.json(filename.php)` where the `filename.php` file queries your database and echos the data to the script. More info can be found here; http://www.d3noob.org/2013/02/using-mysql-database-as-source-of-data.html. Have a read and see if it would work for your situation.
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      1. POHow to Use sql queries to draw dynamic chart in NV D3?
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    2. COCan i use a json file ? how to do that , i haven't got any graph while using data.json in the code.
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      1. USPurushoth
    3. COData in JSON format is certainly usable. (https://github.com/mbostock/d3/wiki/Requests#wiki-d3_json) and by returning the data in a JSON format from a PHP script, you can interface with a MySQL database. This isn't a trivial thing to do, so you may need to do some Googling to see how it will best suit your application.
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      1. POHow to Use sql queries to draw dynamic chart in NV D3?
      1. USd3noob
 

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