title: Charting Millions of Rows
body: <p>Got a quick question on Charting.</p>
  
  <p>Need:
  I need to implement charting for my client and the client dataset contains millions of rows. Data is collected about the target every 10 seconds or so, and it builds up quite an amount of data. I Need to chart this data.</p>
  
  <p>I looked up Google Finance to see how they have done it, to chart MSFT
  <a href="http://www.google.com/finance?q=msft" rel="nofollow">http://www.google.com/finance?q=msft</a></p>
  
  <p>Looks like, at any given time, they are NOT plotting ALL the points.
  Depending on the time-range you select, the data selected and plotted varies.</p>
  
  <p>I would like to get some inputs on how to massage the millions of rows of data, and make it ready to do a graph like that of Google's, and pointers on how to implement the charting with the massaged data.</p>
  
  <p>thanks
  Sean</p>